Which statement about the supreme court's plessy v. ferguson decision is correct? a. it outlawed "separate but equal" facilities in southern states. b. it upheld women's right to vote in federal elections. c. it overturned key provisions of the 14th amendment. d. it gave legal approval for jim crow laws throughout the south.

The correct answer is "D".

Plessy vs Fergusson was a landmark decision by the US Federal Supreme Court which outlawed racial segregation in public facilities as long as these facilities were equal in quality. This event created the doctrine known as "separate but equal" and also gave pathway to the creation of the "Jim Crow Laws". These states laws made officialized racial segregation in public facilities throughout many southern states under the "separate but equal principle".