Government official , how would you prevent illegal aliens from entering the United States?

Someone who accepted the beliefs of social darwinism would have also agreed with which of these statements?

The people are the source for any and all governmental power in the united states

Which effect did the united states supreme court's decision in plessy v. ferguson have? 1. ending segregation in all public schools in america 2. protecting voting rights for african americans by eliminating literacy tests 3. upholding the rights of all citizens to be treated equally by the government 4. authorizing the system that kept black and white people separated