Which of the Following Con Schemes Is Referred to as the "Pigeon

Which of the following con schemes is referred to as the "pigeon drop"?

A) The con artist sells the victim a worthless item that he or she claims is both stolen and valuable.
B) The con artist persuades the victim to put up money on the promise of making much more.
C) The victim pays cash for counterfeit lottery tickets.
D) The con artist sells the victim unneeded services.