What Supreme Court decision declared that the separation of blacks and whites was legal as long as the societies were equal?

a
Roe v. Wade
b
Brown v. Board of Education of Topeka
c
Marbury v. Madison
d
Plessy v. Fergussen

Plessy v. Ferguson

Explanation:

Plessy v. Ferguson, 163 U.S. 537 (1896), was a landmark decision of the U.S. Supreme Court that upheld the constitutionality of racial segregation laws for public facilities as long as the segregated facilities were equal in quality – a doctrine that came to be known as "separate but equal".

51% were unhappy, i think .   ; )