Why Are Researchers Investigating a Possible Role for Glutamate in Schizophrenia

 Why are researchers investigating a possible role for glutamate in schizophrenia?

A) Known antipsychotic medications have their primary effects on glutamate.
B) People with schizophrenia have abnormal levels of glutamate activity.
C) Phencyclidine (PCP) use, which affects glutamate systems, mimics most symptoms of schizophrenia.
D) Glutamate levels are directly influenced by cocaine and amphetamine.