Manifest Destiny was a distinctly racist concept in the first place. The idea was that white man was destined to conquer the west and this meant subduing anyone else who happened to live there. White man alone was entitled to this "destiny". It used the ideas of Jacksonian democracy of a "white man's democracy" to develop these beliefs.
The statement about the Cuban Missile Crisis that is true would be that "<span>d. President Kennedy removed nuclear missiles from Turkey to resolve the crisis," since this was the only way to get the Russians to remove their missiles from Cuba. </span>