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

The answer is letter A. General McClellan was unsuccessful in maintaining the trust and faith of President Abraham Lincoln. He was insubordinate to his Commander-in-Chief because he failed to exercise strict obedience and respect to him (President Lincoln) and privately said negative things about the President. He was primarily removed from command in November after failing to decisively and quickly pursue Lee's Army following the strategically inconclusive but strategic Union victory at the Battle of Antielam and never received another field command from the President.