Which of the Following Are the Causes of Mental Illness

Which of the following are the causes of mental illness? (Select all that apply.)

A) Excessive amounts of brain serotonin, dopamine, and ?-aminobutyric acid
B) Genetic inheritance combined with neurochemical and metabolic changes
C) Living through a severe disaster, whether manmade or natural
D) Physiological abnormalities in the brain structure
E) Posttraumatic stress syndrome (PTSD)
F) Social isolation, rejection, and/or stress