Below are some phrases that car dealers frequently use. The persuasiveness of which one can best be explained by the consistency principle?

A) "We are selling you this car below our invoice cost."
B) "You aren't going to find this car cheaper anywhere else."
C) "You said that this is the car that you want."
D) "If you walk out now, we won't be able to offer you the same promotion later."

Answer: C