(1)When you purchase tickets for an airplane flight or a movie, you are subjected to a common incentive scheme called "peak-load pricing." (2)The idea of peak-load pricing is to create incentives for customers to demand goods and services when supply is ample and not when supply is short. (3) Taking this approach, restaurants often provide low prices before 6 P.M., and tropical resorts offer discounts in the summer to spread their patronage outa cheaper solution than expanding to accommodate more customers during the peak season. (4)Similarly, "happy hour" drink prices in bars would more aptly be called "quiet hour" prices because they create incentives for patrons to visit during what otherwise would be slow periods. 1. The key to the important ideas in this passage is a. a definition. b. a definition and examples. c. a definition and an enumeration