Newman Notices That the Passenger Seated Across from Him on the Subway

Multiple Choice

Newman notices that the passenger seated across from him on the subway has his eyes closed and hasn't moved in a while. But he looks around and sees that no one else, including those passengers who were on the train when he boarded, seems too concerned about this man. He decides that this probably means there isn't an emergency and the man is not in need of help. This line of thinking epitomizes which of the following concepts?

A) Stimulus overload
B) Pluralistic ignorance
C) Audience inhibition
D) Diffusion of responsibility