Answer: B. The President can only fire appointees before they have been confirmed by the Senate
Explanation:
The Appointments Clause confers plenary power on the President to nominate various officials. It also confers plenary power to the Senate to reject or confirm a nominee, through its advice and consent provision. This separation of powers between the President and Senate is also present in the treaty Clause of the Constitution, which gives international treaty-making power to the President, but attaches to it the provision of the Senate's advice and consent.