Civilization in each region developed advance math,science, and engineering.
I'm afraid I couldn't give you a complete answer, or the answer that you're looking for, for this question regarding the Native-born Americans in 1860's since there is no map provided with this question. Try re-posting this question with the map on it.
The answer would be B. It protected rights by letting race be an admission Factor
despite Bakke Victory on the court ( the court still ordered the university to admit Bakke), The supreme Court finally decided that Race is allowed to be an Admission Factor.
