All Cabinet members are nominated by the President and then presented to the Senate for confirmation or rejection by a simple majority (although, before use of the nuclear option during the 113th US Congress, they could have been blocked by filibuster, requiring cloture to be invoked by 3⁄5 supermajority to further consideration). If approved, they are sworn in and then begin their duties. Aside from the Attorney General, and the Postmaster General when it was a Cabinet office, they all receive the title of Secretary. Members of the Cabinet serve at the pleasure of the President; the President may dismiss or reappoint them (to other posts) at will. So A.
