All Project A activities are ahead of schedule except one activity on the critical path. The resource manager asks that team members join Project B, which is important and behind schedule. What should the project manager do?

The project manager should retain the team members on Project A and complete the planned activities as committed. Project A has a critical path activity that is behind schedule, meaning any further delays will impact the project's end date. Releasing team members would exacerbate this issue and jeopardize Project A's success. While Project B is important and behind schedule, the project manager's primary responsibility is to deliver Project A as planned. Asking stakeholders to pause Project A is an extreme measure not justified by the current situation. Agreeing to reassign all team members to Project B would be irresponsible, as it would guarantee Project A's failure. Releasing only non-critical path team members might be an option if Project A were ahead of schedule, but with a critical path activity already behind, this could still introduce risk.