A. Yes, because acceptance criteria can only be understood at a high level during Foundations and will always need further investigation.

Rationale:

In Agile Project Management, while the Foundations phase does involve setting high-level expectations and a prioritized requirements list, the detailed acceptance criteria are often refined during the actual Solution Development iterations or timeboxes. This is because, as the work progresses, the team's understanding of the product grows, and they are better equipped to define detailed acceptance criteria that align closely with the customer's needs and the project's evolving context. It's a collaborative and iterative process, allowing for greater precision in defining what will make a particular feature or requirement acceptable.