The correct answer is B) Christianity was the only religion in the Roman Empire until 476 AD.
The statement that can be said to be true after examining this map is Christianity was the only religion in the Roman Empire until 476 AD.
Although the question does not provide any map, we can research it and say that there is one map that describes the Christian expansion throughout the Roman Empire by 476 AD. The map includes Europe, parts of Asia Minor, and the North of Africa, mostly Egypt. In color green, we can see how expanded Christianity eas in every corner of the Roman Empire.