The second alternative is correct (B).
Religion is a set of beliefs and philosophies that are followed, forming different thoughts. Each religion has its differences in some respects, but the great majority resembles believing in something or someone from the higher plane and in the afterlife.
Even with the growth of other religions, Christianity continues to be the doctrine with more followers worldwide. This is the religious current that believes in Jesus Christ as the son of God and adopts the Bible as sacred scripture.
Other religions also have many supporters, the most prominent being Islamisno, the second largest religion in the world and that must surpass Christianity in this century.