Final answer:
The unity of the Roman Empire eased the work of missionaries due to the stability and infrastructure provided by the government, as well as the acceptance of Christianity by emperors.
Step-by-step explanation:
The unity of the Roman Empire did ease the work of missionaries.
As a unified empire, the Roman government provided stability and infrastructure for the spread of Christianity. Missionaries could travel freely throughout the empire without facing numerous political barriers or restrictions. The acceptance of Christianity by emperors also helped to legitimize the religion and provide it with more resources and support.