The correct option is B Both A and R are true but R is not the correct explanation of A.
Roman priests and leaders were threatened by the popularity of Jesus and believed that he was inciting a political rebellion. Thus, he was sentenced to death. Gradually, Christianity spread and enjoyed the tolerance of the Roman rulers. However, in the later years, they were persecuted and suppressed. Surprisingly, after some years, Constantine, the Roman emperor became a Christian and made it the official religion of the Roman empire.