Can you list the choices so we can help you?
Answer:
It legitimized the establishment of a segregated society in the Southern states.
Explanation:
In the Plessy v. Ferguson Case (1896), the Supreme Court ruled that racially segregated public facilities (common in the Southern States) were legal because they did not imply any discrimination against African Americans as long as they were consistent to the doctrine of "separate but equal" which provided segregated but equal facilities (in terms of quality) to both white and non-white people. As a result, this case legitimized the establishment of a segregated society in the Southern states and allowed for discrimination to continue because, in reality, segregated facilities were rarely equal.
The answer to your question is,
A. Railroad operations across the nation
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D. Ronald Reagan signed the law creating the Martin Luther King holiday.