According to the I.N.V.E.S.T. mnemonic, a good user story should be:
* Independent:Can be developed and delivered without dependencies on other stories.
* Negotiable:Flexible in details and open to discussion.
* Valuable:Must deliver value to the customer or end-user.
* Estimable:Can be estimated to gauge effort required.
* Small:Sized appropriately to be completed within an iteration.
* Testable:Should have clear criteria to determine whether the story is complete.
"Valuable" is a key characteristic that ensures the user story contributes to the product's value. Options A (Incremental), C (Tangible), and D (Satisfactory) are not part of the I.N.V.E.S.T. mnemonic.
References:
* PMI's Disciplined Agile Senior Scrum Master (DASSM) curriculum materials.
* "Choose Your WoW! A Disciplined Agile Delivery Handbook for Optimizing Your Way of Working (WoW)", PMI.

Performingsystem integration testingmore frequently helps identify integration issues early, reducing the cost and time associated with fixing problems discovered later in the development cycle. Continuous integration testing is a core practice in Agile and Disciplined Agile that ensures changes are regularly validated, promoting a smoother integration process. Conducting integration tests more often allows the team to catch defects early and maintain a stable and reliable build.
Options B (adding team members) and C (testing only at the end) are not best practices as they do not address the root cause of the problem. Option D (finding a way to do less integration testing) contradicts Agile principles, which emphasize frequent testing.
References:
* PMI's Disciplined Agile Senior Scrum Master (DASSM) curriculum materials.
* "Choose Your WoW! A Disciplined Agile Delivery Handbook for Optimizing Your Way of Working (WoW)", PMI.

Enforcing adherence to organizational standards is an important aspect of Lean governance in the Disciplined Agile framework. Lean governance involves ensuring that teams follow defined policies, procedures, and standards to align with the organization's goals while allowing for flexibility and responsiveness. It balances the need for governance with the principles of Lean, ensuring that teams work within the boundaries of organizational standards while continuously improving their processes.