Your Local Coffee Shop Gives You a Card on Which

Your local coffee shop gives you a card on which it records your purchases and rewards you with a free cup of coffee after you have bought nine cups. The shop is trying to ensure your loyalty by

A) appealing to your self-esteem needs and making you feel special.
B) differentiating its coffee from that sold by the shop down the street.
C) imposing a switching cost.
D) having the barista address you by name after looking at your card.