Which plan aimed to provide economic aid to European nations to prevent the spread of communism?

The Marshall Plan was specifically designed as an economic recovery program for European nations post-World War II. Officially known as the European Recovery Program, it was initiated in 1948 and aimed at providing substantial financial assistance to help rebuild war-torn economies. The underlying goal was to promote stability and prevent the spread of communism by fostering economic recovery and political stability in Western European countries. By improving the economic conditions in these nations, the United States sought to reduce the appeal of communist ideology and influence during the early years of the Cold War.

In contrast, while the Truman Doctrine also targeted the containment of communism, it focused more on political and military support rather than economic aid. The New Deal was a series of programs in the 1930s aimed at aiding recovery from the Great Depression, which was unrelated to the context of post-WWII Europe. The Lend-Lease Act, which provided military aid to allies before the U.S. entered WWII, does not directly relate to post-war economic assistance but rather focused on wartime support. Thus, the Marshall Plan is the most accurate answer for the question about economic aid to prevent the spread of communism.