The Bystander Effect Is

The bystander effect is:

A) an action by an individual that is intended to benefit another individual or set of individuals.
B) guilt people feel about something they are not personally responsible for.
C) the underestimation of other people's experience of physical pain as well as the pain of social rejection.
D) a phenomenon is which a person who witnesses another in need is less likely to help when there are others present to witness the event.