What doctrine justified legal segregation in the south?
jim crow
plessy v. ferguson
de jure
separate but equal

The correct answer is: "separate but equal"

The "separate but equal" doctrine governed the proliferation of segregated public schools and other facilities under the belief that, if facilities were equal in quality, such system was not violating the equality of rights provision that had been guaranteed for all US citizens by the Reconstruction Amendments to the US Constitution.   

The separate but equal principle was adopted after the decision enacted by the US Supreme Court in Plessy v. Ferguson case  in 1896.

facts: the 14th amendment

the 14th amendment addresses citizenship rights and equal protection of the laws.

the 14th amendment was intended to protect the rights of former slaves after the american civil war.

the 14th amendment was approved by congress in june of 1866 and ratified by the states on july 9, 1868.

the 14th amendment establishes that all persons born in the united states are citizens and are guaranteed all the rights of citizenship.

the 14th amendment establishes that the law protects all citizens equally.

in this case the passage of the 14th amendment   that was violated was the last part in which it states that there is equal protection of the law.