Salvatore Wanted to Borrow $25 from His Mom

Salvatore wanted to borrow $25 from his mom. Because he was not sure if she would agree, he decided to get creative and asked her for $100. Just as he expected, she replied, "You want to borrow $100? Not a chance." He came back with, "Okay, mom, how about just $25?" He was thrilled, but not surprised, when she agreed. Salvatore just utilized which of the following compliance techniques?

A) foot-in-the-door technique
B) reverse-psychology technique
C) door-in-the-face technique
D) overestimation technique