After Witnessing a Car Accident That Killed His Wife, Dan

After witnessing a car accident that killed his wife, Dan says he cannot see. However, medical specialists found nothing wrong with the structure or function of his eyes, and brain scans reveal no evidence of any structural damage to the brain. After holding a case conference, a team of professionals suggests that Dan should be evaluated for the possible diagnosis of

A) hypochondriasis.
B) conversion disorder.
C) somatization disorder.
D) psychophysiological disorder.