What is the primary motivator for David Truman's disturbance theory of interest group formation?

Article I of the Constitution does which of the following?

A) It gives the power to impeach to the House of Representatives and the right to try impeachment cases in the Senate. B) It provides that the vice president is the presiding officer of the Senate and may vote only to break a tie. C) It grants the right of the president to veto legislation passed by Congress and the right of Congress to override this veto with a two-thirds vote in both houses. D) All of the above. E) None of the above.

The reason given by the text for the United States' failure to disarm after the Korean War was

A. the possibility of renewed fighting in Korea. B. our containment policy toward the Soviet Union. C. fear of losing the Cold War. D. public opinion in favor of our being the world's policeman. E. All of these are correct.