Why were civil rights supporters disappointed with the Supreme Court’s 1896 decision in Plessy v. Ferguson?

The court rejected the idea of “separate but equal.”
The court ruled that African Americans were unable to drive.
The court ruled that African Americans were unable to vote.
The court affirmed the idea of “separate but equal.”

D.

Explanation:

The court affirmed the idea of “separate but equal.”

the monroe doctrine is the best known u.s. policy toward the western hemisphere. buried in a routine annual message delivered to congress by president james monroe in december 1823, the doctrine warns european nations that the united states would not tolerate further colonization or puppet monarchs.