Tiana is having a garage sale and notices that someone seems interested in buying a lamp. Tiana approaches the person, suggests a price of $5, and the person quickly agrees. Tiana suddenly wonders if she could get more money for the lamp, so she tells the person that she should check with her husband before selling the lamp. Tiana goes into her house, waits a minute, then returns, saying that her husband will only sell the lamp for $15. Tiana is using a sales strategy known as the _____ technique.