I believer that it is A. However Muslims believe that (like in the Christian bibile) there were many prophets before Mohammed however he was the chosen on and wrote down his spiritual hearings and lead the charge after breaking away for Christianity. Don't forget, both religions share similar (sometimes near identical) creation stores and other tales and both . Don't forget Mohammad is in the christian bible and Jesus is in the Koran, both versions of Jesus are near identical until it comes to the Cross and Res-erection.