Which of the Following Provides Evidence That the Alters of a Person

Which of the following provides evidence that the alters of a person diagnosed with dissociative identity disorder are real to that person rather than fabricated for attention?

A) Most people with this diagnosis have experienced childhood trauma.
B) The alters behave differently from each other.
C) Patients claim to have no memory for acts committed by the alters.
D) When switching between personalities, a patient showed reduced right hippocampal activity, which was not shown when that patient imagined another personality.