Adhita is writing a paper on schizophrenia for her class. In discussing the differing hypotheses about the cause of schizophrenia, which sentence below would be the most accurate to include in her paper?

*Multiple studies have demonstrated that drug dependence can create atrophy in the occipital cortex.
*Post-mortem brain analyses showed too much grey matter development compared to white matter.
*Early studies suggested that an excess of dopamine in the brain produced psychotic symptoms.
*Imaging studies have indicated that schizophrenia involves compression of the ventricles of the brain.