How Do Presidential Appointments Differ from Senior Executives

How do presidential appointments differ from senior executives?

A) Presidential appointments generally stay in their position after the president has left office, while senior executives do not.
B) Presidential appointments do not require the confirmation of the Senate, whereas senior executives must be confirmed.
C) Presidential appointments are selected based on political orientation, while senior executives are selected based on merit.
D) The president makes appointments largely based on qualifications, while senior executives are hired based on party identification.