Carlos Is a Freelance Graphic Designer

Carlos is a freelance graphic designer. Last month, a client hired him to design a website, at a flat rate of $1000. Carlos met with the client numerous times to sketch out the project, and engaged in a fair amount of background research. Just as he was getting ready to sign a contract for the job, the client mentioned, "Oh, by the way, I also need you to design three catalog covers under your contract." Even though Carlos would never design a website AND three catalog covers for just $1000, he had already invested so much time and energy in this client that he ended up just saying yes to everything. Carlos told his friends that he was "tricked" by the client. Social psychologists would say that he was a victim of the ____.

A) legitimization-of-paltry-favors technique
B) low-ball technique
C) labeling technique
D) foot-in-the-door technique