What contribution did the catholic church make to society during the early middle ages?

preserving learning

abolishing serfdom

encouraging trade

overseas expansion

A. PRESERVING LEARNING - THINK THAT THIS IS THE ANSWER !
The contribution that the Catholic Church made to society during the early Middle Ages was that they preserved learning. Because only a few people could read or write during the Middle Ages, the Church ran most of the schools so that it's clergy could be educated.

 Hope that this helpss causee i look back at my civics notes and found that so if ITS NOT RIGHT TELL ME