Why was the supreme court case plessy vs. ferguson important?

It caused desegregation through the argument of separate but equal being useless.

Explanation:

hello,

your answer whould be d

answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.