Answer:
The correct answer is A. The role of the Joint Chiefs of Staff is to serve as objective military advisors.
Step-by-step explanation:
The Joint Chiefs of Staff is the US Armed Forces General Counsel, serving as a military advisor to the civilian administration. Its status is laid down by law and consists of the Chairman of the Staff, the Vice-Chairman and the commanders of the defense branches.
After World War II, the Joint Chiefs of Staff was formally established by the National Security Act signed by President Harry Truman in 1947. The Marine Corps commander was not a full member of it until 1975, when General Louis H. Wilson took office.