Answer:
The temporary introduction of markets is associated with Vladimir Lenin and Joseph Stalin, who implemented the New Economic Policy (NEP) in the Soviet Union in the 1920s as a temporary retreat from full state control of the economy.
Further explanation:
Five Year Plans are associated with Joseph Stalin's policy of centralized state planning and industrialization in the Soviet Union in the 1930s. The Five Year Plans aimed to rapidly transform the Soviet Union from an agrarian society into an industrialized powerhouse. The plans set ambitious targets for production and investment, and focused on the development of heavy industry, such as steel, coal, and machinery. The implementation of the Five Year Plans had a significant impact on Soviet society, as it led to the forced collectivization of agriculture, the relocation of millions of people to work in new industrial centers, and the suppression of dissent.