A Client Who Is Diagnosed with Major Depressive Disorder Asks

A client who is diagnosed with major depressive disorder asks the nurse what causes depression.Which of these is the most accurate response?

A) Depression is caused by a deficiency in neurotransmitters, including serotonin and norepinephrine.
B) The exact cause of depressive disorders is unknown. A number of things, including genetic, biochemical, and environmental influences, likely play a role.
C) Depression is a learned state of helplessness cause by ineffective parenting.
D) Depression is caused by intrapersonal conflict between the id and the ego.