How does the brown case relate to the concept of federalism?
a. revolved around the idea of discrimination.
b. centered on the question of equality.
c. focused on state rights versus national rights.
d. debated the constitutionality of court decisions.

C. focused on state rights versus national rights.
This is because Federalism is an idea of two parts of government, with the national government superseding  the state government. Since in the Brown case the state fought it had the right to refuse, even though the national government passed a law stating schools must be desegregated, the brown case and federalism are related.

Yes all of them are right