In Regard to the Positive and Negative Symptoms of Schizophrenia

In regard to the positive and negative symptoms of schizophrenia:

A) positive symptoms usually respond to antipsychotic drug treatments,whereas negative symptoms usually do not.
B) positive symptoms are thought to be caused by structural deficits in the brain,whereas negative symptoms are thought to be caused by neurotransmitter dysfunction.
C) both positive and negative symptoms probably originate from the same organic causes.
D) both positive and negative symptoms are more common in women than in men with the disorder.