<em>A. School segregation was unconstitutional.</em>
Explanation:
The Brown v. Board of Education case first started when an African American schoolgirl had to walk more than a mile to get to her segregated school when there was a white school only a few blocks away.
Black and white children were not permitted to go to the same schools together. Not only schools but things like restrooms and water fountains were segregated as well. Many of these things got justified by the "separate but equal" clause.
The Brown v. Board of Education case ended up going all of the way to the Supreme Court, where they ruled that segregated schools were in fact unconstitutional. Even if separate facilities were "equal" in nature, they were not equal in the long run. Schools started to become integrated and it became against the law to separate schools by race.
