Which is the most accurate description of the executive office of the president

The Executive Office of the President of the United States is the department responsible for providing support to the President of the United States. Its functions include areas such as presidential communication and the promotion of commercial interests abroad. The person in charge of the EOP is the head of the White House Cabinet, which is currently John Kelly. It includes the closest collaborators to the President of the United States, as well as multiple levels of support personnel dependent on the Presidency. The office was created in 1939 by President Franklin D. Roosevelt.