A project to support an organizational transformation is in the planning phase.

Comprehensive and Detailed Explanation:

When stakeholders are misaligned in expectations or outcomes, the best approach is to facilitate a collaborative discussion, such as a workshop. This helps reach consensus on project goals, aligns expectations early, and ensures shared ownership moving forward.

A may be helpful, but stakeholder alignment is the project manager's responsibility.

B may come too late without first ensuring alignment.

C provides one-way communication rather than engagement.

D is correct as it fosters collaboration and clarity.