All of the following are thought to be causes of poor anger management, aggression and hostility except:

A. Low serotonin levels Low serotonin is associated with impulsivity and aggression in both humans and animals. B. Inconsistent responses to childhood behaviors Inconsistent parenting can lead to poor emotional regulation and difficulty with anger management. C. Positive relationships with parents, teachers and friends Positive, supportive relationships are protective factors against aggression and poor anger control. D. Damage to the frontal and temporal lobes of the brain Brain injuries to areas responsible for judgment and emotion regulation (especially the frontal lobe) can contribute to aggressive behavior.