The presidency and the president's cabinet are defined in of the constitution.

Article II of the Constitution

Explanation:

In section 1, we have:

"The executive Power shall be vested in a President of the United States of America."

In Section 2, we have:

The President shall be Commander in Chief of the Army and Navy of the United States, and of the Militia of the several States, when called into the actual Service of the United States; he may require the Opinion, in writing, of the principal Officer in each of the executive Departments, upon any Subject relating to the Duties of their respective Offices, and he shall have Power to grant Reprieves and Pardons for Offenses against the United States, except in Cases of Impeachment.

the answer is title i subtitle b

the answer would be a).