Why Would a College Student with Delayed Sleep Phase Syndrome

Why would a college student with delayed sleep phase syndrome not want to enroll in an early morning class?

A) She can't wake up on time since she can't fall asleep until between 3:00 AM and 4:00 AM
B) They are more alert in the afternoon so they would do better in an afternoon class.
C) They would be considered night owls and should take evening classes.
D) They wake up refreshed but feel sleepy once they need to do cognitive tasks