A project manager discovers a defect in a deliverable that is due to the customer under contract today. The project manager knows the customer does not have the technical understanding to notice the defect. The deliverable meets the contract requirements, but it does not meet the project manager's quality standard. What should the project manager do in this situation?

A$.$ Issue the deliverable, and get formal acceptance from the customer.

B$.$ Note the problem in the lessonslearned so future projects do not encounter the same problem.

C$.$ Discuss the issue with the customer.

D$.$ Inform the customer that the deliverable will be late.