Which of the Following Is an Example of De Facto

Which of the following is an example of de facto segregation?

A) In a medium-sized city, the black population lives almost entirely south of the railroad tracks while almost the entire white population lives north of the tracks.
B) Separate entrances to a restaurant are created for blacks and for whites.
C) The right to vote is restricted to those whose ancestors had the right to vote.
D) Private schools restrict admission to a single race.