In which of the following ways did major power alliances shift during the course of the war?



A. France crumbled militarily and declared neutrality.

B. The U.S. was initially sympathetic to Germany, signing a nonintervention treaty, but then entered the war on the side of the Allies.

C. Russia began as neutral, then entered the war to oppose German territorial aims.

D. Austria-Hungary left the Triple Alliance and joined the side of the Allies.

E. Italy left the Triple Alliance and joined the side of the Allies.