Final answer:
The U.S implemented a policy to contain communism known as the Marshall Plan by providing economic aid to Western European nations.
Step-by-step explanation:
The U.S. implemented a policy to contain communism known as the Marshall Plan through rebuilding the economies of Western European nations.
The Marshall Plan was initiated in 1948 and provided $13 billion in economic aid to European nations. This aid helped rebuild their infrastructure and restore their industrial capacity, while also ensuring that the U.S. economy remained stable.