Answer:
B) To let people know of his conversion to Buddhism
Explanation:
Edicts of Ashoka pillars in India are known as the first ever evidence of the existence of Buddhism. It was basically a way to let people know about Ashoka's conversion to Buddhism. Till now at least 150 Ashokan Edicts have been found on the rocks, cave walls, and pillars. It is believed that all of them were used to mark his kingdom.