A project manager has completed a full review of remaining tasks and confirms work is complete. What task should they complete next to close out the project? 

a. The project manager should adjust the deadline of the project schedule for extra review. 

b. The project manager should skip asking for sign-off since all the work is finalized. 

c. The project manager should make sure all project management processes have been executed. 

d. The project manager should send a final email to all stakeholders that the project is closed.