Answer:
They embraced Christianity because their leader then , emperor Constantine embraced Christianity .
Explanation:
During the reign of the Roman Emperor Constantine the Great (AD 306–337), Christianity began to transition to the dominant religion of the Roman Empire.
One of the many factors that contributed to the fall of the Roman Empire was the rise of a new religion, Christianity. ... In 313 C.E., Roman emperor Constantine the Great ended all persecution and declared toleration for Christianity. Later that century, Christianity became the official state religion of the Empire.
Although it is often claimed that Christians were persecuted for their refusal to worship the emperor, general dislike for Christians likely arose from their refusal to worship the gods or take part in sacrifice, which was expected of those living in the Roman Empire.
