Jeremy knows it near the end of the story when NetherMagnus tells him that he is already there in Nethergrave.
Explanation:
Nethergrave is Gloria Skurzynski’s short story. It is a tragic story of Jeremy (an 8th grade student) who is addicted to computer games and chatting. A side theme of the story is also about parents spending less time with their children.
Near the end of the story Jeremy asks NetherMagus (a masked character in the game) tat how he could get to Nethergrave to enjoy all the features of the game. On this NetherMagus replies Jeremy “You’re already there!” At this point Jeremy realizes that Nethergrave is not just a computer game, but a kind of grave as well. But it is too late as Jeremy has fully entered Nethergrave now.
C)It causes conflict between him and his parents. Explanation: The narrator spent most of his time listening to music and joined musical classes and bands. Due to this his focus from studies vanished and grades were effected badly.