Which policy provided aid to rebuild european nations and contain the spread of communism

The correct answer would be the Marshall Plan.

The Marshall Plan was developed by George C. Marshall, the Secretary of State under President Harry Truman. Marshall felt it was vital that the United States give economic aid to those countries negatively impacted by World War II. Along with this, Marshall wanted to ensure that these nations would not fall under the control of the communist Soviet Union. This is why the US government dedicated $13 billion in aid to countries all over Europe including France, Great Britain, etc.