Compared with evening-loving "night owls," those who are morning types tend to perform in school and tend to be vulnerable to depression.

Morning persons are persons who usually gets up early in the morning and goes to bed early in the evening
Compared with evening-loving "night owls," those who are morning types tend to perform better in school and tend to be less vulnerable to depression.
When the body and mind is rest, the person has more concentration, is not fatigue and has more energy, and happy.

The correct answer is d. the bottom 40%