Answer:
In the Brown case, the "separate but equal" principle was challenged.
Step-by-step explanation:
Brown v. Board of Education (1954), a case filed by Oliver Brown after his daughter was not allowed to enter any white elementary school in Topeka and was forced to study in a less prepared school, became one of the most important cases in the American history because it challenged the "separate but equal" principle by demonstrating that the 14th amendment was violated under this clause because in reality schools were not equal denied African American children the opportunity to prepare themselves for a better future.
Segregation in public schools was then stated as unconstitutional because it didn't provide equal opportunities for children.