To ensure that the Manager role cannot open a purchase request during the Audit stage, applying an Access When record (B) is the most suitable approach. An Access When record allows for the definition of conditional logic that determines whether a specific action, such as opening a case, is permitted based on the user's role and the current context of the case, such as its stage. By configuring this rule to evaluate to false for users with the Manager role during the Audit stage, you can effectively restrict their access to purchase requests in this stage, aligning with the requirement.References: Pega Community documentation on Access When rules and stage-based access control.