The correct option is D Ashoka propounded the importance of Dhamma.
In the eighth year of his reign, Ashoka declared war to capture Kalinga. A fierce war broke out between the brave people of Kalinga and the determined Mauryan army. Thousands of people died in the large scale slaughter. Ashoka finally won, but the devastation of war and death brought him great pain. And, Ashoka finally decided to give up war and became a follower of Buddhism. He chose to win through dharma rather than yuddha or war. As an ardent Buddhist, Ashoka also extended his passion for protecting the lives of animals. Animal sacrifice was forbidden, and even hospitals were built for animals. During the reign of Ashoka, he sent various emissaries to various countries to propagate Dharma.