Despite the Fact That the Quick-Buzz Coffee Company Provides a Coupon

Despite the fact that the Quick-Buzz Coffee Company provides a coupon in the local newspaper that can be redeemed for $1 off the price of its best-selling coffee beans, not all buyers actually use the coupon. Assuming everyone has a subscription to the newspaper, from this we know that:

A) all coffee drinkers have a highly elastic demand.
B) all coffee drinkers have a highly inelastic demand.
C) the coffee drinkers who use the coupons have less elastic demand than the coffee drinkers who pay full price.
D) the coffee drinkers who use the coupons have more elastic demand than the coffee drinkers who pay full price.