What is the contribution that catholic church contributed to society during the early middle ages? . . a. preserving learning . . b. abolishing serfdom. . c. encouraging trade. . d. overseas expansion.

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