Research Using CT Scans Have Shown That People with Bipolar

Research using CT scans have shown that people with bipolar disorder have which of the following brain abnormalities? This question is based on the Faces Interactive Dysthymic Disorder Module

A) Enlarged ventricles
B) Deterioration in the cortex and cerebellum
C) An underdeveloped limbic system
D) Lesions in the corpus callosum