PLZ HELP!!! 10 POINTS!!! Question from Lord of the Flies

Why does the author reference the book Coral Island, about a group of noble, shipwrecked British schoolboys, in Lord of the Flies? A. so the boys understand how their experience is different from characters in a book B. as a contrast to how Jack and his tribe descend into violent behavior C. to show how the British schoolboys in both books enjoy adventures D. to show how similar the boys in Lord of the Flies are to those in Coral Island