The correct options are:
- the cult of the individual 
 - the increase in censorship 
 - the rise of the secret police 
 - the executions of the Great Purge
 
The Soviet Union was a Marxist-Leninist republic that existed in Eurasia between 1922 and 1991. Although formally constituted as a federation of 15 republics, its political and economic system was de facto strongly centralist, with a single-party political system dominated by the Communist Party until 1990.