Diem researched online and saw that one possible etiology of schizophrenia is excessive ___________.

A) acetylcholine and impaired neural-glial communication
B) acetylcholine and excessive neural pruning in the frontal lobe
C) dopamine and impaired neural-glial communication
D) dopamine and excessive neural pruning in the frontal lobe

Excessive dopamine and excessive neural pruning in the frontal lobe are both known factors in the development of schizophrenia. While impaired neural-glial communication and acetylcholine have been implicated in schizophrenia, they are not specifically related to identical twin studies or frontal lobe development, which are both mentioned in the scenario.