General McClellan was ultimately removed from his command by
 President Lincoln because
 (A) Lincoln believed McClellan was overly cautious and too slow to
 engage
 (B) McClellan’s loss at the First Battle of Bull Run was seen as a military
 embarrassment
 (C) McClellan was caught selling military secrets to Confederate spies
 (D) Lincoln thought McClellan’s strategies were too risky
 (E) McClellan’s political views were unpopular in the North