The correct answer is: "The Brown case addresses whether facilities separated by race are permissible by law".
Brown v. Board of Education was a landmark decision enacted by the US Supreme Court in 1954 which declared segregation in public facilities to be unconstitutional and the principle of "separate but equal" that was accepted in Plessy v. Ferguson was not accepted anymore. In this former case, under the "separate but equal" lemma it was declared that segregation was not discriminatory, and hence did not violate the provision of the equality of rights for all US citizens included in the 14th amendment to the US Constitution, as long as the separate facilities for white and black people were equal in quality. This previous decision was overturn for good in Brown v. Board of Education.