The correct answer is A. The court ruled that "separate but equal" public facilities were constitutional. This is the statement that describes the Supreme Court's decision in the Plessy v. Ferguson case. Thank you for posting your question. I hope this answer helped you. Let me know if you need more help.
The obvious answer would be business leaders. The reason why this is true is becaus business leaders were often the ones who were touting the ideas of social darwinism and how their company is better and will stomp out the smaller one in proper sociodarwinistic fashion.
Joseph Stalin and Vladimir Lenin
The 33rd prestident was Harry S. Truman