____ is a process to determine the completeness of the project work and to gain the customer's acceptance to move the project forward.

A phase gate review is a decision checkpoint at the end of a project phase to evaluate whether to continue, not a formal process for obtaining customer acceptance of deliverables.

Inspection of key results is a technique used within quality or scope processes, not a named process that encompasses the full cycle of completeness verification and customer sign-off.

Verify Scope is the specific project management process in which completed deliverables are reviewed with the customer or sponsor to ensure they meet acceptance criteria. It formalizes acceptance and provides sign-off, allowing the project to proceed to the next phase or close out the current one. This process directly addresses both completeness of work and customer acceptance.

Quality control focuses on monitoring and recording results of quality activities to assess performance, not on formally obtaining customer acceptance of deliverables.