Which of the Following Actions Is Most Likely Diffusion of Responsibility

Which of the following actions is most likely diffusion of responsibility?

A) An individual cannot be held responsible in a court of law for actions that were ordered by a superior office.
B) A person ignores matters that are generally important to a group by may not seem specifically important to him or her.
C) A person acts to further the interests of others ultimately to serve his or her own self-interest.
D) An individual's responsibility to act seems decreased when there are many people around.