Which Factor Has Led to the Expansion of the President's

Which factor has led to the expansion of the president's capacity as manager-in-chief of the federal bureaucracy?

A) The Supreme Court mandated an expansion of the White House to keep pace with Congressional development.
B) The expansion of Internet media required dozens of new media staffers to maintain relations with news websites and maintain a social media presence.
C) The White House downsized the federal bureaucracy by delegating implementation of programs to state and local governments.
D) The White House needed additional staff to follow through on presidential decisions.
E) Modern presidents spend an ever-increasing share of their time raising campaign funds, so they delegate the task of monitoring agencies to White House staff.