Which aspect of the roman empire aided in the spread of christianity?
a-there were many roads and waterways, and travel was safe.
b-persecution only occurred in the very early days of the church.
c-most areas of the empire were tolerant of different religious beliefs.
d-christian leaders negotiated with roman officials to stop persecution.

A-There were many roads and waterways, and travel was safe.

Explanation:

The economy of the Roman Empire was that of a slave empire; the slaves worked, obviously without any remuneration, which produced enormous wealth. The different cities and provinces were connected by a network of communications, roads and ports, which promoted commerce remarkably. This great network of roads throughout the empire, helped to form a common culture, this added to the end of the persecution of Christians, helped to spread the religion throughout the impoerio.

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by improved communication.