The Truman Doctrine stated that the United States

a. should stop the spread of communism.

b. should declare a truce in the Cold War.

c. would support Great Britain and France in all future wars.

d. would remain neutral in all further wars.

The Truman Doctrine stated that the United States a) should stop the spread of communism. The Truman Doctrine is defined as "an American foreign policy to stop Soviet imperialism during the Cold War." At the beginning of this, no troops were put on the ground and financial aid was given to countries who were threatened by the rise of communism.