Please explain : Quick PMP Q

 You are managing a large project with many team members. You want to improve the competency of your team members, as well as their knowledge and skills, so you want to see the list of project team members in order to make some arrangements. In which document would you find this information?


A  Resource calendars.

B Project management plan.

C Work breakdown structure.

D Project staff assignments

Correct answer is given Project Staff Assignment; why it could not be Resouce Calendar?
Please help.
Nevermind!!!  I got the answer. PMBOK pg.224. : RC (part of Staffing Mgmt plan) describes necessary time frames for project team members, either individually or collectivly....
Usualy shown by histogram, if its made collectivly, PM will not get project team members name. Project staff assignment contains team directory.