Final answer:
The Chairman of the Joint Chiefs of Staff may hold the rank of General, which is typically held by a four-star general or admiral depending on the branch of service.
Step-by-step explanation:
The Chairman of the Joint Chiefs of Staff may hold the rank of General. The Chairman is the highest-ranking military officer in the United States Armed Forces and serves as the principal military advisor to the President. This position is typically held by a four-star general or admiral, depending on the branch of service.
For example, General George Washington served as the Chairman of the Joint Chiefs of Staff during World War II, and General Mark Milley currently holds the position as of 2021.