Sylvia Asked Ben to Wear a Pin Supporting the Red

Sylvia asked Ben to wear a pin supporting the Red Cross.When she asked Ben later for a donation to the Red Cross,

A) he would be likely to donate because of the tendency to be consistent in his behavior.
B) he would be unlikely to donate because he had already been wearing the pin.
C) he would be likely to give more than she asked because of the foot-in-the-door technique.
D) he would be unlikely to donate because of the door-in-the-face technique.