Research on Evoked Potential with People with Dissociative Identity Disorder

Research on evoked potential with people with dissociative identity disorder has revealed that:

A) different subpersonalities show different brain-response patterns.
B) people with dissociative identity disorder do not show different brain-response patterns for subpersonalities.
C) no differences are found in brain activity between controls and individuals with dissociative identity disorder.
D) control subjects who are asked to pretend they have different personalities are able to create different brain-response patterns for each subpersonality.