Answer: C - Constantine, the 57th Emperor of the Roman Empire, and his co-Emperor Licinius were signatories to the Edict of Milan in 313 C.E. (the text quoted above). The order protected the practice of all religions in the Roman Empire, chiefly the practice of Christianity. Until the Edict of Nantes, Christians were often persecuted. Constantine ultimately converted to Christianity, which established a precedent for rulers to act as both political/military leaders and religious leaders.