Copernicus Initiated Studies That Led to His Revolutionary Theories Because

Copernicus initiated studies that led to his revolutionary theories because

A) there was a need to reform the Christian calendar.
B) his father superior instructed him to do so.
C) he wanted to refute some Protestant theories.
D) a colleague had challenged him when he was teaching at the University of Paris.
E) spiritual crises had plagued him all his life, as they have most men of genius