Answer:
c) Socialist republic
Step-by-step explanation:
After the October Revolution in 1917, Vladimir Lenin and the Bolsheviks established a socialist government in Russia. This led to the creation of the Russian Soviet Federative Socialist Republic (RSFSR), which later became part of the larger Soviet Union. Lenin's government was based on socialist and communist principles, aiming to create a classless society with the means of production owned and controlled by the state. This system was characterized by one-party rule, centralized planning of the economy, and the eventual suppression of competing political parties and dissent. It was fundamentally different from constitutional monarchy, parliamentary democracy, or a fascist regime.