A company manager has turned in project objectives, and requests that the project manager start the project immediately. The project manager informs the company manager that the project cannot be started. Which of the following is an appropriate reason for not starting the project?

A.
Project sponsor approval has not been received.

B.
Projects can only be implemented by upper management.

C.
The project manager already has several ongoing projects.

D.
The project team has not been formed.