Why Did Some Experts Doubt the Claim That Kenneth Bianchi,the

Why did some experts doubt the claim that Kenneth Bianchi,the "Hillside Strangler," had multiple personality disorder?

A) An expert in hypnosis tricked Bianchi into feigning new symptoms.
B) There was no known trauma during his childhood.
C) Bianchi did not know the names of the personalities.
D) Bianchi's poor verbal skills made his responses difficult to comprehend.