How Did the Church,perhaps Inadvertently,support Common People's Superstition and Reliance

How did the church,perhaps inadvertently,support common people's superstition and reliance on magic?

A) The sacramental power of the Roman Catholic clergy was itself a form of magic.
B) The church had always stressed the reality of demonic powers,opposed to God,in this world.
C) The church often employed astrologers to assist in determining the church calendar.
D) Folk magic often had its roots in pagan religion.
E) Superstition was inconsistent with literate civilization.