Which Statement Best Provides Evidence for Structural Difference in the Brains

Which statement best provides evidence for structural difference in the brains of patients with schizophrenia?

A) In some patients with schizophrenia, there is an excess amount of "gray matter" in the cerebral cortex.
B) Schizophrenic patients have smaller ventricles in their brains.
C) The majority of patients with schizophrenia have enlarged ventricles in their brains.
D) Many patients with schizophrenia have increased activity in the frontal lobes of the brain.