It’s that anyone can make a difference no matter how big or small,race,religion,sex.
The biggest problem for racial integration is that people live in segregated areas: so simply a school can have a majority of children from one background because the area around the school is inhabited by people of this background.
So the correct answer is d. Segregated housing patterns are still common in many communities.
B. 1 millivolt is equal to .001 volt