The voyages of european exploration during the 15th and 16th centuries were made possible mainly by
a) the protestant reformation.
b) the success of the crusades.
c) many new or improved technologies.
d) a desire to prove the earth was round.

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.