Answer:
B
Explanation:
Before 1917, Russia was not a country of Communism. Karl Marx developed the idea that the working class will revolt against capitalists and promote economic equality. This idea, Marxism, inspired the Bolsheviks to take over Russia and establish the system of Marxism, which would turn into Communism. This would be the system that Joseph Stalin would force onto Eastern Europe after World War II. This enforcement would lead to the Cold War where Capitalists and Communists collide.