Answer:
The right choice is:
A) Reinforced the doctrine of separate but equal facilities based on race.
Step-by-step explanation:
The US Supreme Court sentence in the Plessy v. Ferguson stated that keeping separated accomodations for people of different races was not unconstitutional if they were equal. This 1896 landmark decision validated the Jim Crow laws enacted in the South that created discrimination for black people, and allowed other states to pass segregationist legislation.