In Medieval Practice,if "Evil Spirits" Could Not Be Driven Out

In medieval practice,if "evil spirits" could not be driven out through exorcism,how was the "diagnosis" revised?

A) The abnormal behavior must be the result of some physical ailment.
B) The abnormal behavior must be occurring because the person is a witch or warlock.
C) The abnormal behavior must be occurring because the person is a prophet or saint.
D) The abnormal behavior is the result of some severe psychological trauma.