You 're an idiot if you think you 're going home . Training 's a waste of his time and yours . And at first Bert had enjoyed their training sessions , which had begun extremely informally and had , in the last two weeks , actually begun to shape into something he 'd thought was interesting .

Question: Why would the narrator be prevented from going home ?
Answer: Bert has not left yet .None of the above choices .Their training is not done .Bert is not allowing it .