John, a 30-Year-Old Male, Acts "Like a Different Person" and Often

John, a 30-year-old male, acts "like a different person" and often refers to himself by different names when he is intoxicated. His friends worry whether he has a mental health disorder. John sees a psychologist, who informs him that he cannot be diagnosed with dissociative identity disorder. Why not, according to the APA?

A) John is too old for dissociative identity disorder.
B) Symptoms cannot be attributable to the physiological effects of a substance.
C) Dissociative identity disorder is more common in females.
D) Men typically deny these symptoms when they see a mental health professional.