The Fundamental Idea of the Containment Doctrine, Embraced by President

The fundamental idea of the containment doctrine, embraced by President Truman, was

A) the Soviet Union should be gradually forced to give up its sphere of influence in Eastern Europe.
B) the Soviet Union should be prevented from trading with nations in Africa and Asia.
C) the West and the Soviet Union should seek to contain the spread of nuclear weapons.
D) Soviet communist expansion in regions of the world should be blocked by firm political, economic, military, and diplomatic defense of free peoples and nations by America.
E) military competition between the West and the Soviets should be replaced by economic competition.