Many people hang up on telemarketers, but others will listen politely to their pitches even if they are not interested in the product. Telemarketers know that anyone who agrees to listen to a pitch is more likely to buy the product, thanks to the ________ phenomenon.

A) risky shift
B) polarization
C) foot-in-the-door
D) door-in-the-face

Visual images typically do not preserve spatial relationships among objects.