Answer:
The correct response is Option B: Belief that the Soviet Union would try to expand communism if it were not opposed by countries like the U.S.
Step-by-step explanation:
This policy was adopted by the executive branch of the United States beginning in the late 1940s. It was framed as a means to check the expansionist policy of the Soviet Union by U.S. diplomat George F. Kennan. Kennan called for a "vigilant containment of Russian expansive tendencies.” Truman's administration took up this posture and implemented it in the Truman Doctrine of 1947. The United States provided aid to Greece and Turkey in exchange for resisting Soviet ideas and influence. During the Eisenhower administration, this form of military and economic aid was extended to Middle Eastern countries in exchange for resisting communist aggression.