The correct option is B after a single conquest he dedicated himself completely to the cause of peace
Ashoka ruled from 268 to 232 BCE. The Kalinga War included one of the largest and bloodiest battles in Indian history, the sight of such a carnage and massacre of human lives, and the sufferings of the wounded made a deep impression on Ashoka's mind. The unhappiness of the women and children made him very sad and unhappy. He vowed never to make a war again in his life. He decided to devote the rest of his life to the spread of Dharma.