In 1896, the United States Supreme Court ruled in the Plessy v. Ferguson case. What was that ruling?

A.
Slaves could not to sue in court because they were not citizens.
B.
African Americans were now citizens and had the right to vote.
C.
Facilities that were "separate but equal" were constitutional.
D.
All public facilities throughout the South were to be integrated.

C. Facilities that were "separate but equal" were constitutional.