Answer:
C) Christianity immediately became a "permitted" religion.
Explanation:
Edict of Milan, proclaimed by Constantine the Great equated Christianity with other religions in the Empire; this ended the era of persecution of Christians. The proclamation proclaims a common religious policy agreed in February 313 in Milan by Constantine the Great, the ruler of the western part of the Roman Empire, and Licinius, the ruler of the eastern part of the Empire.
Although Christianity was tolerated in practice in the West after the abdication of Emperor Diocletian in 305 and the coming into power of the father of Constantine the Great, in the East, persecution of Christians continued until 311, when the emperor Gallery published an edict of tolerance.
Christians of the entire Roman Empire were guaranteed freedom of religion, as well as the followers of pagan cults, were guaranteed the immediate return of confiscated goods, even if sold or donated to private individuals by the state and, if this was not possible, they were guaranteed royalties from the imperial treasury . Since then, Christians have been free from legal uncertainty, and their religion was no longer superstitio or religio illicita, but was equated with other cults on state-tolerated terms.