The "Revolving Door" Exists Because ______

The "revolving door" exists because ______.

A) it is easier to hire local people as lobbyists
B) some of the most effective lobbyists are former government officials
C) the qualified pool of applicants for such jobs is so small
D) lobbyists envy government officials and want to take their jobs, so they are willing to trade
E) government officials envy lobbyists and want to take their jobs, so they are willing to trade