THE CORRECT ANSWER IS (D).CONTAINMENT THEORY, FIRST USED BYTRUMAN,...

71. The correct answer is (D).Containment theory, first used byTruman, stated that the United States should take an aggressive pos-ture toward the Soviet Union, short of instigating a third world war.In time, the Soviet Union would become less belligerent or wouldchange. The end of communism in Eastern Europe—and the SovietUnion—seems to have proven this theory. Choice (A) refers to theidea that if one country in Asia fell to communism, they all would.Choice (B) promised military and economic aid to nations in theMiddle East and potential U.S. intervention against Communistaggression. Choice (C) provided aid to Turkey and Greece afterWorld War II to fight off Communist takeovers. Choice (E) providedmaterials and financial aid to seventeen European countries torebuild after World War II.