Which of the Following Is True of People's Tendency to Help

Which of the following is true of people's tendency to help someone in an emergency?

A) When more than one person witnesses an emergency situation,the sense of diffusion of responsibility reduces among the bystanders.
B) The more people who are present in an emergency,the less personally responsible each individual feels.
C) When there are many potential helpers in an emergency situation,each individual feels substantial personal responsibility.
D) If there are many people present in an emergency situation,they believe that responsibility for intervening cannot be shared.