Which of the Following Defines Staffing

Which of the following defines staffing?

A) It consists of grouping people and assigning activities so that job tasks and the mission can be properly carried out.
B) It is the process of anticipating future events and conditions and determining courses of action for achieving organizational objectives.
C) It involves managerial functions like issuing directives, assignments, and instructions that initiates action.
D) It involves selecting, placing, training, developing, compensating, and evaluating employees.
E) It is the process of evaluating and regulating ongoing activities to ensure that goals are achieved.