[单项选择]Friction between America’’s military and its civilian overseers is nothing new. America’’s 220-year experiment in civilian control of the military is a recipe for friction. The nation’’s history has seen a series of shifts in decision-making power among the White House, the civilian secretaries and the uniformed elite (精英). However, what may seem on the outside an unstable and special system of power sharing has, without a doubt, been a key to two centuries of military success. In the infighting dates to the revolution, George Washington waged a continual struggle not just for money, but to control the actual battle plan. The framers of the Constitution sought to clarify things by making the president the "commander in chief." Not since Washington wore his uniform and led the troops across the Alleghenies to quell (镇压) the Whiskey Rebellion has a sitting president taken command in the field. Yet the absolute authority of the president ensures his direct command. The president was
A. Because Lincoln was inexperienced in military affairs, he had to do so.
B. Grant whole-heartedly believed in Lincoln, and their cooperation proved to be a none-such.
C. All things considered, Grant was somewhat better than McGlellan.
D. The decision to put Grant in charge of the Union Army was not against the constitution.