Answer:
The answer is B. The Nation of Islam believed in the separation of races. (Novanet/Gradpoint)
Explanation:
Some of the peoples it conquered didn't want to be ruled by the Incas and were rebellious, mainly, and it was so big that it couldn't keep the conquered in line very well.
He was criticizing their teachings and practices.
I believe the answer for the first question is B and the second one A, hope I helped! :)