Question

what were the main reasons behind the popularity of Christianity answer briefly​

Answer 1

Answer:

The Christianity had the royal patronage. It spread because it was spread with human effort and coercion; not because it had some great virtues as compared to other religions you have mentioned. Many people of the Roman Empire did not have scope to know much about the other religions.

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Answer 2

Answer:

because of monks

Explanation:

monks travelled from one place to another and told about jesus