The Mother of a Teenager Is Concerned Because She Says

The mother of a teenager is concerned because she says he stays up late, has eight hours sleep a night, but is hard to wake up for school, yawns all day and is irritable. The nurse would reply:

A) "This is normal. He is just going through a hormonal period."
B) "Adolescents need 12 to 14 hours sleep."
C) "We need to assess his sleep patterns."
D) "You need to make him go to bed earlier."