A project manager submits a change request.

When a change request is rejected due to a code freeze, the project manager should communicate to the stakeholders to inform them of the situation. Transparent communication ensures that all parties are aware of the project's current status and any limitations affecting progress. This step is crucial for managing expectations and maintaining stakeholder trust.

This approach is supported by the CompTIA Project+ PK0-005 exam objectives, specifically under Domain 1.3: Given a scenario, apply the change control process throughout the project life cycle, which emphasizes the importance of communication in change management.