<u>D) American farms and factories raised production levels.</u>
Explanation:
The Marshall Plan, or European Recovery Program, was an initiative by the United States to help restore the economy of western Europe after World War II and serve US economic and political interests as well. The program provided about $15 billion to help finance the reconstruction of cities, industries, and infrastructure of Western Europe. It achieved to halt the spread of communism in the European continent, discourage the creation of the European Common Market and also strengthen the US economy because it promoted commerce between European countries and the United States, and consequently, it raised production levels of American farms and factories.