Since Carter's Mother Suffers from Depression and His Father Is

Multiple Choice

Since Carter's mother suffers from depression and his father is an alcoholic, Carter is often neglected, but he has a supportive group of friends. Despite his circumstances, he maintains a positive outlook. What may be helping Carter to maintain his positive attitude?

A) low intelligence
B) his circle of friends
C) low problem-solving ability
D) a high cortisol level