52. Most consumers do not get much use out of the sports equipment they purchase. for example, seventeen percent of the owners job more than once a year, and only severnteen percent job more than once a week.
Which of the following, if true, casts most doubt on the claim that most consumers get little use out of the sports equipment they purchase?
C. Many consumers purchases jogging shoes for use in activities other than jogging
D. Consumers who take up jogging often purchase an athletic shoe that can be used in other sports.
Why not D?
D-- Althletic shoes, as jogging shoes, are sport equipment, so we consider them irrelevant. If consumers use an athletic shoe not only for jogging but also for other sports, we cannot conclude that people make a lot use of the sport equipments? --> doubt the conclusion that most consumers get little use out of the sports equipment.
OG explaination of D: most likely to be among those who frequently use sports equipment and whose existence the argument concedes. ( already agree that these people frequently use sport equipment, but why argument concedes cannot casts doubt?) | 
