256A new regulation has been approved that will impact the deliverables in the fourth phase of the project The delivery is following an iterative approach and is currently completing the second phase.What should the project manager do next?
选项：

A:Consult with the project sponsor to discuss a cost increase
B:Acquire approval for an exception to the implementation of the new regulation.
C:Get approval for the additional budget from the steering committee
D:Meet with subject matter experts (SMEs) to assess the impact to objectives