Which of the following statements about the heritability of major depressive disorder MDD) is true?

a. Nearly 100% of people with genetic liability can be accounted for by the personality trait of dogmatism
b. Nearly 50% of people with genetic liability can be accounted for by the personality trait of aggressiveness.
c. The heritability is approximately 40% and the personality trait of neuroticism accounts for a substantial portion of this genetic liability
d. The heritability of MDD depends on whether the individual's mother or father had MDD
e. Less than 10% of people with genetic liability can be accounted for by the personality trait of perfectionism.

According to twin studies, it has been estimated that the heritability of major depressive disorders (MDD) is around 37% to 40%. On average, people who share at least 50% of their genes with a family member that has MDD has more than 2 times at risk of having MDD themselves.

It has also been concluded from research that negative affectivity, or neuroticism, has a major link with the onset of MDD. In response to a stressful life, individuals with high levels of neuroticism are at a higher risk of developing MDD