Which of the Following Scenarios Probably Will Not Result in the Bystander

Which of the following scenarios probably will not result in the bystander effect?

A) You come across someone lying on a walking path while you are walking alone at your local nature center.
B) You see someone pass out at a concert.
C) You drive past an automobile accident where a crowd has gathered.
D) You come across someone lying on a busy sidewalk in a large city.