Steven Is Often Referred to as a Morning Person Because

Multiple Choice

Steven is often referred to as a morning person because he wakes up at 5 a.m.and goes to sleep at 10 p.m. ,whereas Jennifer is described as a night owl because she wakes up at 10 a.m.but stays up until 3 a.m.Steven's and Jennifer's sleeping and waking habits may differ because of the differences in:

A) diet.
B) exercise.
C) suprachiasmatic nucleus core neurons.
D) suprachiasmatic nucleus shell neurons.