which of the following sentences from martin luther king, jr.'s nobel price acceptance speech best demonstrates king's hope for the future?

a. i accept this award today with an abiding faith in america and an audacious faith in the future of mankind.
b. every time i take a flight, i am always mindful of the many people who make a successful journey possible — the known pilots and the unknown ground crew.
c. i refuse to accept the cynical notion that nation after nation must spiral down a militaristic stairway into the bell of thermonuclear destruction.
d. i accept the nobel prize for peace at a moment when 22 million negroes of the united states of america are engaged in a creative battle to end the long night of racial injustice.