The nobles did which of these things? ? 0.o
1.practiced plowing
2.jousted
3.brought unity to medieval society
4.protected the serfs from attack

At the time of the brown v. board of education decision,schools were segregated everywhere in the country.several states had laws requiring segregated schools.schools in nearly every state has been desegregated.segregation was common in the north, but not in the south.