14. what was the gulf of tonkin resolution? a. the declaration that the spread of communism wouldn't be tolerated in asia b. an authorization to use force in korea c. an authorization for the president to use military forces in vietnam d. a promise to aid the government of south vietnam

The answer is D. It provided President Lyndon Johnson to use conventional
military force in Vietnam.  Initially the
U.S. only wanted to assist the South Vietnamese army against the North but
eventually it got more involved in the war. Public opinion in America went
against the war and that led to U.S. withdrawal from Vietnam

The Gulf of Tonkin resolution is:

C. An authorization for the president to use military forces in Vietnam

Explanation: The administration of President Johnson had been working on a resolution that will give the full authority to have a direct military action in Vietnam.