The Supreme Court's decision in Brown v. Board of Education (1954) struck down which practice that had been in place since Reconstruction?

a
the practice of requiring citizens to pass a literacy test in order to vote
b
the practice of using state tax money to fund public schools
c
the practice of "separate but equal" schools for black and white students
d
the practice of integrating Georgia’s public colleges and universities

c) the practice of "separate but equal" schools for black and white students.