After the takeover by the Communists, the Bolsheviks, led by Lenin, there were several drastic changes in politics, economics. Imperial Russia ceased to exist, and apart from the savage executions of the Imperial family, the names of cities were changed, and the reform of the economy that was not very successful was attempted. It was a civil war after the revolution. But what was changed in 1922 is the name of the state, so that Russia became a Soviet Union.
The answer is: B.
