The correct answer is letter A.
Explanation: The Joint Chiefs to Staff is a corps of uniformed senior United States Department of Defense leaders advising the Secretary of Defense, the Homeland Security Council, the National Security Council, and the president on military affairs.
The Joint Staff is a Pentagon-based team of members from each of the four Armed Forces Department of Defense that assists the President and the Vice President in the exercise of their responsibilities and is managed by the Director of the Armed Forces. Major Ensemble, who is a Lieutenant General or Vice Admiral of the Navy.