Answer:
The correct answer would be B, Superiority about other races.
Step-by-step explanation:
Superiority about other races is most often the basis for racist behavior in the United States. Racism is basically thinking someone's own race as superior to someone's other race. This racism has been in the United States right from the colonial era. In that era, white Americans were considered superior, and were given privilege over the other races and minorities. So this racism became the mind set of people in the United States and now reflects in the behaviors of white Americans. They think themselves superior than other races which is most often the basis of racist behavior in people of United States.