The correct answer is B) By bolstering European economies to discourage them from supporting communism.
The United States demonstrated its commitment to containment during the event described in this headline by bolstering European economies to discourage them from supporting communism.
That is why it was so important for President Truman to establish the Marshall Plan to help with the reconstruction of western Europe. The economic program for the recovery of Europe was enacted in 1948 considered more than $15 billion to help the countries and prevent the spread of Communism, as had happened in Poland, Hungary, Bulgary, and Romania. Indeed, it was the policy of containment of Harry S. Truman.