The Police Find a Man Who Is Dishevelled and in a Daze

The police find a man who is dishevelled and in a daze wandering through the downtown area.When the police ask him for his name,he seems bewildered.A search of missing persons photographs reveals that this man was reported missing three months ago in a town more than 1000 kilometres away.The man is most likely suffering from

A) dissociative fugue.
B) dissociative amnesia.
C) schizophrenia.
D) dissociative identity disorder.