He had completely forgotten what he was doing , though he should have expected it . This was how things went every morning . Nagi would come in before anyone else , he 'd make his way to his seat , then sit there silently until homeroom was over . It was when Omi saw the first flash of color from his hair that made him lose it . Pretty much every ounce of logic he had dissipated from his mind .

Question: What 's a possible reason this person completely forget what they were doing ?
Answer: None of the above choices .Because this is how things were every morning .Because they are forgetful .Because he should have expected something .