The Initially Successful German Offensive in 1918 Was Launched

The initially successful German offensive in 1918 was launched

A) in part, because Russia had left the war and the Americans had not yet arrived.
B) when moderates, who wanted a compromise peace, were overruled by the military leadership.
C) in part, because Germany would be out of reserves by the summer.
D) because the German military convinced Kaiser Wilhelm that Germany could still win the war.
E) All of these.