One of the article's central ideas is that Ashoka's conversion to Buddhilar influenced how he led his empire How does the author introduce this CENTRAL idea?

(A) by highlighting the history of the past leaders in Ashoka's family
(B)
by describing the central beliefs of Buddhism and how they differ from other religions
(C)
by explaining the events that led Ashoka to abandon violence and adopt Buddhism
(D)
by showing how modern archaeologists discovered information about Ashoka