The correct answer is: B. Jewish rejection of the Trinity, it is the most direct phenomenon that led to Christianity separating from Judaism.
The Trinity means that God is just One God that has three persons: Father, Son and Holy Spirit. The Christianism believe that Jesus is the Son of God, and that he resurrected from the death to save humanity from their sins. The Jews didn’t agree with the idea that Jesus was the Son of God, and even less that Jesus was God himself, the representation of the second person of God. The followers of Jesus began to spread the teachings from Jesus separating themself from the Jews. Later they wrote the Gospels and the other books of the New Testament in which they wrote about the life and death of Jesus and his teachings.
