To be sure, the President's control over foreign affairs had been growing since the Theodore Roosevelt administration (1901-1909)(President Roosevelt's acquisition of the Panama Canal Zone preceded Woodrow Wilson's decision to enter World War which was a prelude to Franklin Delano Roosevelt's management of the run-up to the victorious American effort in World War II. In the 1950s, Harry S. Truman's response to the Soviet
threat included the decision to fight in Korea without a Congressional declaration of war, and Dwight Eisenhower used the Central Intelligence Agency and brinkmanship to contain Communism. Nineteenth-century
presidents had had to contend with Congressional influences in foreign affairs, and particularly with the Senate Foreign Relations Committee. But by the early 1960s, the president had become the undisputed architect of
U. S. foreign policy
One reason for this was the emergence of the United States as a great power with global obligations. Neither Wilson nor FDR could have imagined taking the country to war without a Congressional declaration, but the
exigencies of the cold war in the 1950s heightened the country's reliance on the president to defend its interests. Truman could enter the Korean conflict without having to seek Congressional approval simply by describing
the deployment of U. S. troops as a police action taken in conjunction with the United Nations
Which of the following statements describes the authors main argument in the passage?

-congress must reassert its responsibility to declare war in order to ensure a balance of power
-presidential power in foreign policy has expanded since the beginning of the twentieth century
-the korean war was a turning point in presidential power
-the acquisition of the panama canal gave the President undisputed power over foreign policy