Answer:
The president shall have the power to appoint executive department heads.
Explanation:
The Constitution makes no mention of anything like a Cabinet, instead saying only that the president shall have the power to appoint executive department heads, with the Senate’s approval, and that the president may require the opinion, in writing, of these officials.
The framers were of many minds on the question of how to establish an advisory apparatus, and so took the path of least resistance and left it to be hashed out later.
