The correct choice is: The ruling was found in favor of the plaintiff, ruling that separate but equal is unconstitutional.
In Brown v. Board of Education, the Supreme Court utilized the process of judicial review to evaluate the constitutionality of state-sanctioned segregation in public schools. The Court ultimately determined that the doctrine of "separate but equal," established in Plessy v. Ferguson, was inherently unequal and thus violated the Equal Protection Clause of the Fourteenth Amendment. This landmark decision effectively overturned previous precedents that allowed racial segregation.