The principle of separate but equal was

established by

ABrown v. Board of Education
BWesbery v. Sanders
CPlessy v. Ferguson
DRegents of University of California v.

Bakke

EHeart of Atlanta Motel v. United States

Verified Answer :

It was established by Plessy v. Ferguson and overturned by Brown v. Board of Education

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The answer is C Plessy v. Ferguson. It is a landmark United States Supreme Court decision in the jurisprudence of the United State, upholding the constitutionally of state laws requiring racial segregation in public facilities under the doctrine of "separate but equal."