What Observation Has Supported the Idea That Dissociative Identity Disorder

What observation has supported the idea that dissociative identity disorder might involve learning?

A) Dissociative identity disorder is not related to a history of childhood abuse.
B) Hippocampal damage can result from childhood abuse and is shown in dissociative identity disorder.
C) Different alters show different cardiovascular activity patterns.
D) Different alters show different skin conductance patterns.