Which best explains why the Supreme Courts decision in Plessy v. Ferguson was unconstitutional?

The Supreme Court's decision in Plessy v. Ferguson was unconstitutional because it upheld the doctrine of "separate but equal," which legitimized racial segregation and violated the Equal Protection Clause of the 14th Amendment. This ruling perpetuated systemic discrimination and inequality, failing to recognize that separate facilities for different races were inherently unequal. Furthermore, it ignored the historical context of racial discrimination in the United States, reinforcing oppressive social structures rather than promoting justice and equality.