The correct answer is A) private investment.
During the Cold War, the Soviet Union supported government control of production while the United States supported private investment.
As part of its Communist doctrine, Joseph Stalin, the leader of the Soviet Union decided to control the means of production in his territory. For him, this was a way to exert control and authority over the production of goods that Russia needed in those years. On the opposite, the United States government opted to support capitalism, free market, and private investment in order to create jobs, and maintain the prosperity of the country. This was the right decision for America, that helped the nation to become one of the most powerful countries of the world.