Which evidence from “the american promise” is sufficient to prove lyndon b. johnson’s argument that we must fight to ensure that all americans have the right to vote?

a. "for the fact is that the only way to pass these barriers is to show a white skin."

b. "for with a country as with a person, 'what is a man profited, if he shall gain the whole world, and lose his own soul? '"

c. "the constitution says that no person shall be kept from voting because of his race or his color…we must now act in obedience to that oath."

d. "somehow you never forget what poverty and hatred can do when you see its scars on the hopeful face of a young child."