Ned seeks therapy after having recurrent episodes of feeling "detached from himself" for several months, but he has not lost his self-awareness or memory. He notes that he feels like a robot, disconnected from his movements and actions. He is most likely suffering from ______.

A) dissociative fugue
B) conversion disorder
C) dissociative identity disorder
D) depersonalization/derealization disorder

Ned's symptoms match those of depersonalization/derealization disorder, which is characterized by feelings of detachment from oneself, as if one is observing their own actions from a distance, or experiencing the world as if it is unreal or distorted. Dissociative fugue involves periods of amnesia and wandering from one's usual environment, conversion disorder involves physical symptoms without an underlying medical explanation, and dissociative identity disorder involves a fragmentation of one's identity into multiple distinct personalities.