题目选项分析

Company Alpha buys free-travel coupons from people who are awarded the coupons by Bravo Airlines for flying frequently on Bravo airplanes.The coupons are sold to people who pay less for the coupons than they would pay by purchasing tickets from Bravo.This marketing of coupons results In lost revenue for Bravo.

To discourage the buying and selling of free' travel coupons, it would be best for Bravo Airlines to restrict the

【选项】amount of time that the coupons can be used after they are issued