The customer has reviewed the deliverables of a project and finds that they are acceptable, and must now communicate that acceptance to the ?

C. Formal written is the obvious answer.

Answer: CExplanation: Once your project team is done with the work, it's time to check the deliverables against the scope statement, WBS and scope management plan. If your deliverables have everything in those documents, then they should be acceptable to stakeholders. When all of the deliverables in the scope are done to their satisfaction, then you're done with the project! What comes next? Formal acceptance, which means you have written confirmation from the stakeholders that the deliverables match the requirements and the project management plan. Since this communication is a project document, it's formal written communication.

The form of communication that is acceptable is a formal written communication.