The best response that describes how the Fourteenth Amendment extended and limited civil rights to Black Americans is:
The Fourteenth Amendment defined citizenship in the U.S., made all citizens equal before the law, and guaranteed due process to all citizens; however, it did not extend voting rights to Black Americans or prevent the separate but equal doctrine.
This statement accurately reflects the key aspects of the Fourteenth Amendment: it established citizenship and equal protection under the law but did not address voting rights or effectively challenge the separate but equal doctrine established by Plessy v. Ferguson.