Sarah Thought She Was Getting a Great Deal While Buying

Sarah thought she was getting a great deal while buying a house, though she later learned that the real estate agent did not convey to her certain additional expenses. Sarah felt compelled to close the deal, even though she would be paying too much in the deal. Which technique did the real estate agent use to take advantage of Sarah?

A) the door-in-the-face technique
B) the low-ball technique
C) the foot-in-the-door technique
D) the planting-the-seed technique