While Walking Down the Street Tim Sees a Man Slumped

Multiple Choice

While walking down the street Tim sees a man slumped over grabbing his chest.Tim looks around at the other pedestrians who don't seem concerned.He assumes that,if they aren't worried,then everything is OK and keeps walking.This is an example of

A) diffusion of responsibility.
B) egoism.
C) pluralistic ignorance.
D) the social responsibility norm.