15. After the Neolithic Revolution, humans began to settle in small villages. What allowed the growth of larger cities and towns? O the invention of slavery
surplus food that could be stored and shared
the human desire for bigger buildings
O none of the above

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