Brian Was Diagnosed with Schizophrenia at Age 22

Brian was diagnosed with schizophrenia at age 22. Home movies of Brian when he was 4 years old reveal that he actually showed less positive emotion than his classmates and that he had some strange hand movements and other unusual motor patterns. These findings are consistent with the neurodevelopmental perspective, which states that __________.

A) schizophrenia is explained by an abnormality of genes that control motor function
B) many cases of schizophrenia have childhood preludes or precursors.
C) poor parenting causes deficits that can be observed from an early age
D) none of the above