Answer: B. It was the first time that the Supreme Court ruled on the 14th amendment, and its interpretation opened the door for racial discrimination and segregation well into the 20th century.
Explanation:
The Slaughterhouse Cases, simply ruled that the privileges and the immunities of a citizen which were protected according to the Fourteenth Amendment were only limited to what was in the United States Constitution and that the rights that were given by individual states were not included.
The judge's ruling simply made the Fourteenth Amendment useless as this led to racial discrimination and segregation.