Which best explains why the supreme court’s decision in plessy v. ferguson was unconstitutional?

Since segregation laws did not provide equal protections or liberties to non-whites, the ruling was not consistent with the 14th Amendment.

In Plessy v. Ferguson the Supreme Court decided that segregation was fine as long as things were equal..."separate but equal". However in Brown v. Board of Education, it was proven that when things are separate, they are not equal. By allowing for separation, they were creating inequalities. This then proved that the Plessy v. Ferguson ruling was unconstitutional. What's interesting is that the verdict has never been overturned. There have been other decisions like Brown v. Board of Education that help prevent separate but equal.