Which of the Following Is NOT True About Presidential Appointees

Which of the following is NOT true about presidential appointees to bureaucracies?

A) They often do not know their own agency subordinates very well,much less people in other agencies.
B) They must be recommended by the Office of Personnel Management's "rule of three."
C) As political appointees,they are often unaccustomed to the administrative routines,budget cycles,and legal complexities of their agencies or departments.
D) They tend to spend fewer years in their positions than those in the civil service.
E) According to Hugh Heclo,their most important trait is their transience.