Who Controls the Federal Reserve System

Who controls the Federal Reserve System?

A) Largely the president, with the Council of Economic Advisers and the Senate playing advisory roles
B) Presidents, who have the power to change system policies through executive orders and control of its board members and chair
C) The system's chair and board, who are appointed by presidents (with Senate confirmation) , but who make decisions independently
D) Institutional members, although presidents can have some influence over them through appointed chairs and board members