Answer :
The correct answer is: "A: racially segregated facilities"
The Plessy v. ferguson case in 1896 gave rise to a landmark decision of the US Supreme Court. The case questioned whether the existence of segregated public facilities was constitutionaly legal or not. The decision issued by the court stated that segregated facilities were legal as long as the quality on all of them was the same, therefore giving rise to the principle of "separate but equal".