The neurodevelopmental hypothesis of schizophrenia suggests that schizophrenia may be caused, in part, by
a. low levels of expressed emotion in the family of the schizophrenic patient
b. disruptions in the normal maturational process of the brain before or at birth
c. genetic factors that interact with environmental stressors during infancy
d. abnormal levels of dopamine and serotonin in the cerebral cortex
