D: Never. The entire Scrum Team is accountable for creating value every Sprint.
Explanation: According to the Scrum Guide, the Scrum Team consists of one Product Owner, one Scrum Master, and Developers. The Scrum Team is responsible for all product-related activities, including delivering a valuable, usable product increment every Sprint. The Product Owner is accountable for maximizing the value of the product and the work of the Developers. The Developers are accountable for creating a plan for the Sprint, the Sprint Backlog; instilling quality by adhering to a Definition of Done; and adapting their plan each day toward the Sprint Goal. The Scrum Master is accountable for establishing Scrum as defined in the Scrum Guide, helping everyone understand Scrum theory and practice, and removing impediments to the Scrum Team's progress.
Therefore, the Developers are not individually accountable for the value of a Product Backlog item selected for the Sprint, but collectively accountable as part of the Scrum Team. The value of a Product Backlog item is determined by the Product Owner, who orders the Product Backlog items based on stakeholder needs and feedback. The Developers collaborate with the Product Owner to understand the value and requirements of each Product Backlog item and deliver a potentially releasable product increment that meets the Definition of Done and the Sprint Goal.
References:
* [Scrum Guide], section 2.2: "The Scrum Team is responsible for all product-related activities from stakeholder collaboration, verification, maintenance, operation, experimentation, research and development, and anything else that might be required."
* Accountabilities in Scrum | Scrum.org: "Scrum has three accountabilities, each with a different focus :
Product Owner (green figure) The "What". With a focus on Value, time to market, return on investment and Total Cost of Ownership (TCO). Developers (red figures) The "How". Focus on building something that is Done - that the increment is useable and potentially releasable."
* What is a Developer in Scrum? | Scrum.org: "The specific skills needed by the Developers are often broad and will vary based on the type of work they are doing. However, the Developers are always accountable for: Creating a plan for the Sprint, the Sprint Backlog Instilling quality by adhering to a Definition of Done Adapting their plan each day toward the Sprint Goal"

Customer satisfaction is a measure of how well a product or service meets or exceeds the expectations and needs of the customers. It is an important indicator of the value and quality of a product or service, and it can affect the loyalty, retention, and profitability of the customers.
Customer satisfaction should be measured frequently, as it can change over time depending on various factors, such as the market conditions, the customer feedback, the product updates, the competitor actions, and the customer behavior. Measuring customer satisfaction frequently can help the Product Owner and the Scrum Team to inspect and adapt their product vision, strategy, roadmap, backlog, and increments based on the customer needs and preferences. It can also help them to identify and resolve any issues or gaps that may affect the customer satisfaction and value delivery.
Measuring customer satisfaction quarterly, daily, or annually is not optimal, as it may not reflect the current state of the customer satisfaction and may miss some opportunities or risks that may arise in between the measurement intervals. Quarterly measurement may be too slow to respond to the fast-changing market and customer demands. Daily measurement may be too noisy and costly to collect and analyze. Annual measurement may be too outdated and irrelevant to inform the product decisions.
Reference:
Scrum Guide: https://www.scrumguides.org/scrum-guide.html
Customer Satisfaction: https://www.agilealliance.org/glossary/customer-satisfaction/

Explanation
Management that is external to the Scrum Team is not involved in the Daily Scrum because:
The Daily Scrum is an event for the Developers to inspect their progress towards the Sprint Goal and adapt their Sprint Backlog accordingly. It is not a status meeting or a reporting session for managers or other stakeholders.
The presence of external managers may hinder the self-organization, collaboration, and transparency of the Developers. It may also create pressure, interference, or distraction for the team.
The Scrum Master is responsible for ensuring that the Daily Scrum is held and that only the Developers participate. The Product Owner and other stakeholders may attend as observers, but only if the Developers find it useful.
References:
Scrum Guide 2020, page 12: "The purpose of the Daily Scrum is to inspect progress toward the Sprint Goal and adapt the Sprint Backlog as necessary, adjusting the upcoming planned work." Scrum Guide 2020, page 13: "The Developers can select whatever structure and techniques they want, as long as their Daily Scrum focuses on progress toward the Sprint Goal and produces an actionable plan for the next day of work. This creates focus and improves self-management." Scrum Guide 2020, page 13: "The Daily Scrum is an internal meeting for the Developers. If others are present, the Scrum Master ensures that they do not disrupt the meeting."

Explanation
It is not true that the Product Owner makes sure the correct stakeholders are invited to the Sprint Retrospective. They might have important instructions for team improvements. This is because:
* The Sprint Retrospective is an event where the Scrum Team inspects how the last Sprint went with regards to individuals, interactions, processes, tools, and their Definition of Done. The purpose of the Sprint Retrospective is to plan ways to improve quality and effectiveness.
* The Sprint Retrospective is an internal event for the Scrum Team only. It is a safe and confidential space where the Scrum Team can openly and honestly reflect on their strengths and weaknesses, and identify actions to improve their performance and collaboration.
* The stakeholders are not invited to the Sprint Retrospective. They do not have a say in how the Scrum Team works or what they should improve. The stakeholders can provide feedback and suggestions to the Scrum Team in other events, such as the Sprint Review or the Product Backlog refinement sessions.
* The Product Owner is a member of the Scrum Team who is accountable for maximizing the value of the product resulting from the work of the Scrum Team. They are responsible for identifying and articulating the Product Goal, which is a long-term objective for the product that guides all the activities of the Scrum Team.
* The Product Owner does not make sure the correct stakeholders are invited to the Sprint Retrospective.
They might have important instructions for team improvements. This would violate the
* self-management and autonomy of the Scrum Team and undermine their trust and empowerment.
References:
* [Scrum Guide], page 18, section "Sprint Retrospective"
* [Scrum Guide], page 7, section "The Scrum Team"
* [Scrum Guide], page 17, section "Sprint Review"
* [Scrum Guide], page 6, section "Product Owner"
* [Scrum Guide], page 10, section "Product Goal"