Not very sure but I don’t think there are
Answer:
Under Ashoka the Great, the Maurya Empire
Explanation: expanded into the southern part of the Indian subcontinent.
A,b and d maby but i think im right
Christianity continued to spread because of many missionaries going out and Spreading the word of God. One other reason would have to be the spread of Catholicism which was Christianity but, later changed because of the Romans. This is my basic Knowledge but, I'm not sure if this is going to help but, here you go. :D