The correct answer is "It established the separate but equal standard."
The Supreme Court case Plessy vs. Ferguson revolved around a man by the name of Homer Plessy. Homer Plessy was taking a railroad car in the state of Louisiana that was supposed to be reserved for all white passengers. Homer Plessy, who was 1/8th black, decided to sit in this car for all white passengers anyways. He was arrested for this action and brought to court.
After a series of cases in the lower courts, the case was taken on by the Supreme Court. In this case, the Supreme Court justices ruled that "separate but equal" does not violate the Constitution. This results in segregated schools, restaurants, buses, and other public places/modes of transportation.
Conflict between other countries that are Russian allies always causes concern for war-weary americans because if the conflict continues, our government will be obligated to get involved.
The leaders which were key to the independence movement in South America were b) Simon Bolivar and d) Jose de San Martin. Jose de San Martin "was an Argentine general and the prime leader of the southern part of South America's successful struggle for independence from the Spanish Empire." Simon Bolivar was "a Venezuelan military and political leader who played an instrumental role in the establishment of Venezuela, Ecuador, Bolivia, Peru, and Colombia as sovereign states, independent of Spanish rule."
D)The ruling undermined the idea of free labor and supported slave labor" since it stated that slaves could not sue for their freedom in court, even if they were in free states.