With Respect to the Development of Schizophrenia, Researchers Have Reported

With respect to the development of schizophrenia, researchers have reported which of the following?

A) If an identical twin develops schizophrenia, the stress brought about by this event usually causes the other twin to develop the disorder.
B) Diet and exercise can prevent schizophrenia in women but not in men.
C) If a woman contracts an infection during pregnancy, the child has an increased risk of developing schizophrenia later in life.
D) none of these