Juan's wife brought him to the emergency room because Juan could not remember his name,the names of his family members,where he worked,or any other personal information.Extensive tests at the hospital indicated that Juan's memory problems were not due to an injury,an illness,drugs,or any other physical or medical condition.A clinical psychologist suggested that Juan might be suffering from

A) a fugue state.
B) schizophrenia.
C) antisocial personality disorder.
D) dissociative identity disorder.

A fugue state involves a sudden loss of personal identity and memory, and the individual may end up wandering away from their home, which matches with Juan's symptoms. Schizophrenia or antisocial personality disorder typically do not involve memory loss or memory disturbance. Dissociative identity disorder (formerly known as multiple personality disorder) involves the presence of two or more distinct personality states, with gaps in memory for everyday events, but this disorder is generally rare and not likely to be the cause of Juan's symptoms.