What was a result of the Supreme Court’s Plessy v. Ferguson decision?

What was a result of the Supreme Court’s Plessy v. Ferguson decision?

a. Public education became more expensive for southern states.
b. Integration of schools was to occur with deliberate speed.
c. Illiteracy among school-aged children would be eradicated.
d. De facto segregation could no longer occur.
e. Black teachers were paid the same as their white counterparts.

ANSWER
A