Which of the Following Does Not Support the Idea That

Which of the following does not support the idea that CNS stimulants produce a psychosis that strongly resembles schizophrenia?

A) High doses of amphetamine in animals produce a syndrome of stereotyped licking, sniffing, and gnawing.
B) Cocaine and amphetamine addicts often have hallucinations and delusions.
C) Clinicians have difficulty discriminating between paranoid schizophrenia and drug-induced psychosis.
D) Amphetamine given to schizophrenics causes the occurrence of new symptoms.