The correct answer is communism.
The Russian Revolution involved the overthrowing of Czar Nicholas II. The citizens were extremely dissatisfied with Czar Nicholas II, as corruption was a constant part of his reign. Along with this the Czar also frequently disregarded the Duma, the legislative body that is supposed to help him make decisions. These factors all allowed for Vladimir Lenin and the communist party to take overthrow the Russian government and create a new one based on communist principles.