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

The foot-in-the-door phenomenon refers to the tendency for people to comply with a small request first, and then be more likely to comply with a larger request later. In the context of telemarketing, if someone agrees to listen to a pitch, they have already complied with a small request and are therefore more likely to comply with the larger request of buying the product.