What group used false science to claim whites were the superior race?

Ineed answers 5 and 6 on my social studies homework reply to this question i posted

According to robert kennedy, how might the historian see 1962a. as a year of resistance by the southb. as a year of great progress in civil rightsc. as a year of rioting and violenced. as a year of resegregation

What is significant about the power that russian federal cities are granted?