After MrsChanski and Her Children Had Helped Themselves to Free Samples

Multiple Choice

After Mrs.Chanski and her children had helped themselves to free samples of the cookies being promoted in the grocery store,she felt obligated to buy some,even though they seemed unreasonably expensive.Her reaction best illustrates the significance of

A) superordinate goals.
B) the reciprocity norm.
C) the bystander effect.
D) diffusion of responsibility.