Which of the Following Describes "Diffusion of Responsibility

Which of the following describes "diffusion of responsibility"?

A) in a group or a crowd, the tendency for each group members to lose awareness of his or her own individuality
B) in an anonymous group, the tendency of members to avoid taking responsibility for actions, assuming that others will do so
C) the tendency of individuals to increase their liking for something that they have worked hard to attain
D) the tendency for members of a close-knit group to think alike for the sake of harmony and to suppress dissent