What was the Truman Doctrine?

A. The U. S. practice of containment against Communism

B. A statement that the United States would defend its interests in
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C. The U. S. policy that used atomic weapons against Japan

D. AU. S. domestic policy against Communism in America

a. the us practice of containment against communism

Explanation:

the truman doctrine states that the united states would do whatever was necessary both economically and militarily to contain the spread of communism around the world.

hello there the answer is a

sorry if i am wrong hope that : )

"a government in which power is divided between state and national levels". federalism is a system of government in which entities such and state and province, share power with the national government.