Train Collectors Jack McCoy and Sandro Dias Have Decided to Open

Multiple Choice

Train collectors Jack McCoy and Sandro Dias have decided to open a store that sells train memorabilia--everything from toy train sets to full-sized railroad signs.After 18 months in business,they have noticed that most of their sales are to the same small group of customers (about 40 people) even though they have records to show their are over 200 active train collectors within a 50-mile radius of their store.Their retailing experience is supportive of the:

A) optimizer principle
B) min-max rule
C) majority fallacy
D) rule of demand
E) 80/20 principle