Which argument helped overturn the "separate but equal" policy?

issa brain pop question

The repeal of such laws establishing racial segregation, generally known as Jim Crow laws, was a key focus of the Civil Rights Movement prior to 1954. The doctrine of “separate but equal” was eventually overturned by the Linda Brown v. Board of Education Supreme Court Case in 1954.

the answer is a. or c.

answer; protectionism fosters competition and keeps price regulated;