David Is Selling a Set of Knives That Is Very

Multiple Choice

David is selling a set of knives that is very expensive for the entire set. One tactic he uses is to ask people to try the paring knife and then ask them to purchase it for $5.00. Then he asks them to try other knives until he eventually works up to asking consumers to purchase the entire set of knives. Which selling technique is David using?

A) foot-in-door
B) door-in-the-face
C) even-a-penny-will-help
D) "I'm working for you!"