Which of the following must happen before a project is closed?

A. The customer has to accept the project's product. B. Lessons learnt must be documented C. The project team must have a new project D. Project Charter The answer is given as "The customer has to accept the project's product." However, Project closing may also happen in case of Project Termination. The only probable option which I can see is "project charter" which initiate the Project. Hence Project charter shall happen before project closing.