Congress members, and most governmental businesses.
<span>B. National Association for the Advancement of Colored People ~~ this is not the answer, I got it wrong the first time~~</span>
I think it was because we really don't know what exactly happened in the past.
Also, I'm pretty sure people did not keep track of colored people back then.
Manifest Destiny refers to the United State's unyielding believe that the country will span from the Atlantic Ocean to the Pacific Ocean. Therefore, the answer is A.