When a Person Is Selected by the President to Head

When a person is selected by the president to head an agency and to shift its policies in the direction of the president's, the appointee generally finds that

A) agency personnel change direction quickly.
B) career subordinates have very little influence on policy.
C) an agency is immune to presidential politics.
D) subordinates wield considerable power.
E) there is little to prevent him or her from accomplishing the goal.