They began using e-mail I've checked with three other sources and they say the same thing
Answer:
Edict of Milan
Explanation:
With the passage in AD 313 of the Edict of Milan, in which the Roman Emperors Constantine the Great and Licinius legalised the Christian religion, persecution of Christians by the Roman state ceased.
A hogan is more of a permanent home, it takes a lot more time and materials to build. The Navajo are people that had kept sheep and goat, they mostly lived at between 5000 and 8000 feet in elevation. Some apache did make make hogans but they also used tipis. Apaches live a more mobile life style so other types of houses were more useful.