The best and most correct answer among the choices provided by your question is the first choice or letter A. The Marshall Plan was enacted to support a U.S. foreign policy to keep communism from spreading, also known as containment.
The Marshall Plan was a federal rescue plan developed to allow the United States to assist European nations on both sides of the war in rebuilding damaged industry and infrastructure in the wake of World War II; the secondary goal of the Marshall Plan was to help prevent the growth of Communist influence in the war.
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