What was a primary cause of the collapse of the soviet union in the late 20th
century?

Gorbachev's decision to allow elections with a multi-party system and create a presidency for the Soviet Union began a slow process of democratization that eventually destabilized Communist control and contributed to the collapse of the Soviet Union.

the answer is b just took the test

a. "how old man winter was driven back” and “ormuzd and arimanes"