Hildegard of Bingen's Canonization Was Stalled in the Middle Ages

Hildegard of Bingen's canonization was stalled in the Middle Ages because:

A) her candidacy was subject to new, stricter regulations by the Church.
B) she was found not to be holy enough.
C) after her death she was discovered to have held heretical beliefs.
D) after her death it was discovered she was a man.
E) her visions were not believed to be genuine.