The best answer that analyzes the impact of the Supreme Court case rulings of Plessy v. Ferguson and Brown v. Board of Education on individual freedoms and equal protection is:
Plessy v. Ferguson created the separate but equal doctrine and Brown v. Board ended the separate but equal doctrine in public education.
This response correctly identifies the significance of both cases: Plessy v. Ferguson (1896) established the "separate but equal" legal doctrine that allowed for racial segregation, while Brown v. Board of Education (1954) overturned that doctrine in the context of public education, ruling that segregation in public schools was inherently unequal and unconstitutional.