When Marsha Continued to Waver on Her Decision to Buy

When Marsha continued to waver on her decision to buy a new computer, the salesperson finally said to her, "If you buy this computer system today, I'll throw in a larger hard drive and a couple of computer games for your kids. Have we got a deal?" The salesperson appears to be using the _____ technique to persuade Marsha to buy the computer system.

A) foot-in-the-door
B) door-in-the-face
C) that's-not-all
D) devil's advocate