In View of Current Research, Which of the Following Is

In view of current research, which of the following is the best summary statement concerning the cause of schizophrenia?

A) Inherited potential and environmental stress combine to bring about disruptive changes in brain chemistry.
B) Schizophrenics are really adapting to an impossible environment created by double-bind communication.
C) A by-product of adrenaline called adrenochrome accumulates in the schizophrenic's body.
D) Extremely traumatic experiences early in childhood cause the first split in personality to form two different integrated identities in the person with schizophrenia.