Recent research and increased understanding about the role of neurotransmitters in psychopathology point out that:
a. each psychological disorder is caused by a deficit in a specific neurotransmitter.
b. chemical imbalances of the brain are the cause of psychopathology.
c. simple cause/effect conclusions stating that an individual neurotransmitter abnormality causes a disorder are incomplete.
d. neurotransmitters have very little to do with psychopathology for most individuals but may be the single cause of disorders for others.