In What Way Did the Catholic Church Play a Social

In what way did the Catholic Church play a social as well as a religious role in medieval society?

A) The church was a poor person's best option for moving up in the social hierarchy.
B) The church owned most of the property in Europe and employed most serfs.
C) The manorial system was organized around Catholic dioceses.
D) As clerical offices became hereditary,the church developed an aristocracy.
E) Knights had to be priests before they could enter a feudal relationship.