The best response that accurately describes how the three Reconstruction Amendments extended and limited civil rights to Black Americans is:
"The Reconstruction Amendments abolished slavery, defined citizenship, extended voting rights for all citizens, and defined equal protections and due process, but put restrictions on voting rights and did not prevent the separate but equal doctrine."
This response acknowledges the positive changes brought by the amendments while also highlighting the limitations and obstacles that remained in terms of voting rights and the persistence of segregation under the "separate but equal" doctrine, which was later upheld in the Supreme Court case Plessy v. Ferguson.