Explanation/Reference:

The information radiator is a key tool in Agile that provides a real-time, visual display of the project's current status, including progress, completed tasks, blockers, and upcoming work. This is typically made accessible to all stakeholders and is updated regularly to ensure transparency and communication. Instead of relying on emails or meeting invites, the Scrum Master should direct the customer representative to the information radiator, as it provides the most up-to-date and easily accessible information about the project's progress. This encourages transparency and aligns with Agile principles of open communication and visibility.

The correct answer is D - Present the idea at the next ceremony attended by stakeholders to obtain their input.
Agile emphasizes transparency and collaboration with stakeholders. Since the organization values security highly, decisions that impact quality or policy must be discussed openly with stakeholders who have the authority to weigh cost-benefit trade-offs.
From the PMI Agile Practice Guide:
"Agile teams embrace customer collaboration and transparency. When decisions have business or organizational implications-such as security or compliance-stakeholders must be involved in evaluating trade-offs." (PMI Agile Practice Guide, Section 4.2 - Stakeholder Engagement) Mike Griffiths states:
"When teams face decisions that could impact non-functional requirements like security, these should be escalated transparently to stakeholders for evaluation." (Mike Griffiths, PMI-ACP Exam Prep, Chapter 3 - Value-Driven Delivery) Incorrect options:
* A and C could result in bias or lack of organizational alignment.
* B is too late and internal-only for a business-critical concern.