Final answer:
The Joint Operations Plan (JOP) summarizes the personnel requirements for a mission defined by the Secretary of Defense (SecDef).
Step-by-step explanation:
The correct answer is a) Joint Operations Plan (JOP). Once a mission is defined by the Secretary of Defense (SecDef), the joint task force headquarters will identify the personnel requirements for the mission. These requirements will be summarized in the Joint Operations Plan (JOP). The JOP outlines the objectives, tasks, and resources needed to accomplish the mission.