__________ refers to the situation where the number of crowd members will influence whether or not someone in trouble will receive assistance.

A) Reverse discrimination
B) The actor-observer effect
C) The bystander effect
D) The fundamental attribution error

The bystander effect is the phenomenon where individuals are less likely to offer assistance to a victim when other people are present. This is because the responsibility to act in a situation is diffused among the crowd members, leading to a decreased sense of personal responsibility to take action.