The Disintegration of the Soviet Union Came About Not Only

The disintegration of the Soviet Union came about not only because of the collapse of communism but also because of

A) The active promotion of a breakup by the United States
B) A successful Polish invasion of Russia
C) Nationalist independence movements in which ethnic groups and nationalities throughout the USSR pushed for independence
D) The overthrow of Gorbachev in a coup by hardline communists