In 1965, president johnson immediately used the authority of the gulf of tonkin resolution to
a. withdraw all us troops from north vietnam.
b. commit half a million troops to fight in vietnam.
c. begin sustained bombing of north vietnam.
d. begin sustained bombing of south vietnam.

Correct answer choice is :

On August 7, 1964, Congress declared the Gulf of Tonkin Resolution, allowing President Johnson to take any steps he thought were important to counter and to encourage the preservation of international peace and protection in southeast Asia. North Vietnamese army torpedo boats bombed the USS Maddox while the warship was in international waters in the Gulf of Tonkin. There is no denying that truth.

a phrase from a poem by ralph waldo emerson about the battle of lexington and concord. emerson's words read, “here once the embattled farmers stood / and fired the shot heard round the world.”