Please help me answer this question!!Why do you think the US was so concerned with Communism?

Containment, Containment was a foreign policy of the United States of America, introduced at the start of the Cold War, aimed at stopping the spread of Communism and keeping it "contained" and isolated within its current borders of the Union of Soviet Socialist Republics (USSR or the Soviet Union) instead of spreading to a war

Answer might be b i think

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