The Mauryan Leader Ashoka Converted to Buddhism and Became a Unique

The Mauryan leader Ashoka converted to Buddhism and became a unique leader because

A) of his visions and revelations.
B) his grandfather Chandragupta had insisted on it.
C) of Buddhist support for his government policies.
D) he was overwhelmed by the brutality of his early conquests.
E) of his abdication in favor of Siddhartha Gautama.