Context: My poor , poor 1st years . Mitsu was n't very energetic today , so he was n't running around , but lots of other boys were . I do n't know what got into them .
Question: Why was Mitsu and the first years so tired ?
Option 0: None of the above choices .
Option 1: They are being deprived of sleep .
Option 2: They are hurting from fighting .
Option 3: They are not used to school .
Answer: 3