Jerzy wanted his friend Rollo to go skiing with him for the day. Rollo did not want to go because he said it would cost too much money. Jerzy said it would just cost $20. When they got there, lift tickets cost $20 as Jerzy had said, but Rollo also had to pay for parking, ski rentals, and rental insurance. Jerzy used the _________ to get Rollo to comply