Question

united states foreign policy changed following world war ii as the united states
became more involved in world affairs
returned to a policy of isolationism
rejected membership in the united nations
pursued a policy of appeasement toward the soviet union

Explanation:

After World War II, the U.S. abandoned its pre-war isolationist stance. It helped form the United Nations, implemented the Marshall Plan, and adopted the Truman Doctrine, all of which reflected deepened engagement in global affairs. Isolationism, rejection of the UN, and appeasement of the Soviet Union do not align with post-WWII U.S. foreign policy.

Answer:

A. became more involved in world affairs