The correct answer is option 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.". The famous speech “The American Promise” by President Johnson delivered a special message to the Congress: it is not right to deny any fellow American the right to vote. President Johnson stating that "The Constitution says that no person shall be kept from voting because of his race or his color", is evidence that support his argument.