After the sponsor approved a new quality report and it was distributed to stakeholders, a senior manager requested changes to the colors and sizes of some graphs. What should the project manager do?

The project manager should tell the manager to submit a formal change request. This ensures all changes are properly documented, evaluated for impact on scope, schedule, cost, and quality, and approved through the defined change control process. This maintains project control and prevents scope creep. Declining the change is inappropriate as stakeholders can request changes. Making changes in the next report or asking the team to implement them immediately bypasses the change control process, leading to undocumented alterations and potential project instability.