Jake is moving so asked his friend Steve to help him move a couple of pieces of furniture out of his apartment. Steve agreed. Then Jake said, "Hey Steve, being you're helping me move my stuff out of my old place, can you drive over with me to my new apartment and help me move in?" Steve responds, "Sure, why not." This is an example of
a. the door-in-the-face-effect.
b. the foot-in-the-door effect.
c. the low-ball technique.
d. the high-ball technique.