The Spouse of a Patient Diagnosed with Schizophrenia Says, "I

The spouse of a patient diagnosed with schizophrenia says, "I don't understand how events from childhood have anything to do with this disabling illness." Which response by the nurse will best help the spouse understand the cause of this disorder?

A) "Psychological stress is the basis of most mental disorders."
B) "This illness results from developmental factors rather than stress."
C) "Research suggests that this condition more likely has a biological basis."
D) "It must be frustrating for you that your spouse is sick so much of the time."