When does the Close Project or Phase process need to be performed in case of multi-phased projects?

A. The Close Project or Phase process needs to be done at the end of each phase of the project; however, it is left to the project manager's discretion on whether he/she wants to perform this process in between phases. It necessarily needs to be done at the end of the project.

B. The Close Project or Phase process is done at the end of the project in case the work is contracted out to external performing organizations.

C. The Close Project or Phase process needs to performed at the end of the project and involves closing out the entire project scope.

D. The Close Project or Phase process needs to be performed at the end of each phase of the project and involves closing out the portion of project scope applicable to that phase.