Question

The NAACP, an interest group, used its legal prowess to have an earlier Supreme Court ruling in favor of "seperate but equal" overturned. What was the landmark case? A. Plessy v. Ferguson B. Brown v. Board of education C. Ohio v. Mapp D. Miranda v. Arizona

Answer 1

Plessy V Ferguson was the case from like the 1890s that said 'separate but equal' was okay.  (It think that's what your question is asking.)

Brown v. Board was the 1954 one that overturned it.  

Answer 2

B. Brown v. Board of education

In the Plessy v. Ferguson Case (1896), the Supreme Court ruled that racially segregated public facilities were legal as long as the facilities for blacks and whites were equal.

Nevertheless, the Brown v. Board of Education Case (1954) overturned the decision of the Plessy v. Ferguson Case. It determined that “separate but equal” facilities were in fact, unequal, they were a form of discrimination that instilled a sense of inferiority to African Americans and thus it violated the 14th Amendment, an amendment that guaranteed all citizens equal protection of the laws.

The case had been supported and defended by Thurgood Marshall and a team of National Association for the Advancement of Colored People. The case became one of the NAACP’s greatest legal victories that soon inspired marches and demonstrations of the civil rights movement of the 1950s and ’60s that eventually led to the enactment of more fair laws to African Americans.