Answer:
A
Step-by-step explanation:
Ashoka (Askoa) was a king of India in the Mauryan Empire who converted to Buddhism (not C). Buddhism rejects the caste system (not B). He was a warrior before he converted, and used elephants in battle. However, he is most known for his diverse empire and dharma policy. He favored religious tolerance and peace, and used public work and social policies to create a centralized empire. I believe this makes A the best answer.