Which U.S. foreign policy was primarily aimed at limiting the spread of communism?

The correct option focuses on the Containment policy, which was a significant component of U.S. foreign policy during the Cold War. This strategy aimed to prevent the spread of communism beyond its existing borders, particularly in Europe and Asia. It was based on the belief that if communism could be contained, it would eventually collapse under its own weight.

The policy emerged as a response to the Soviet Union's expansionist tendencies after World War II, specifically following events such as the Soviet takeover of Eastern European countries and the establishment of communist governments in places like China. American leaders, notably John Foster Dulles and President Harry S. Truman, advocated for a series of measures—both military and diplomatic—to counteract Soviet influence.

This approach led to various actions, including the Marshall Plan, which aimed to strengthen European economies to resist communism, and military interventions in regions deemed vital to U.S. interests, such as Korea and Vietnam. The overarching goal was to create a global environment where democratic nations could thrive without the threat of communist ideology overtaking them.