I could not tell if this was true or false and it was confusing please help! :(The wheel is an example of technology that was developed for one purpose and then adapted for many other purposes. True or false

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