Since She Was a Little Child Kelly,age 12,has Woken Up

Since she was a little child Kelly,age 12,has woken up feeling fully rested at 3:00a.m. She goes to sleep every evening at 7:00 p.m. Would this be considered a sleep disorder?

A) Yes, circadian rhythm sleep-wake disorder.
B) No, because Kelly is not yet an adult.
C) No, because it doesn't cause her distress or impairment.
D) No, because we don't know whether her family has promoted this sleep pattern.