What are the reasons why christianity spread throughout the roman empire

The spread of Christianity was made a lot easier by the efficiency of the Roman Empire, but its principles were sometimes misunderstood and membership of the sect could be dangerous. Although Jesus had died, his message had not. Word of his teachings spread to Jewish communities across the empire.

answer; /// i do believe that the correct answer is (a); a farming tribe that settled primarily along the mississippi and arkansas rivers;