Which of the following best explains why Plessy v. Ferguson is significant?

Homer Plessy's participation in an act of "planned disobedience" earned him jail time.

Homer Plessy's act resulted in a court decision that created the "separate but equal" doctrine.

Homer Plessy's actions did not achieve his goals, but the process for getting a ruling in such matters was finally made clear.

Homer Plessy's arrest was overturned by the Committee of Citizens, giving the committee a new-found authority.