Because tires have become longer lasting and cheaper, tire retailers are being forced to find new sources of revenue. Some stores are selling more services, such as tire rotations and oil changes, and others are selling a broader range of products, such as seat covers, air fresheners, and other amenities. Neither strategy will work, however, because people who are shopping for tires don't buy anything other than tires.
Which of the following, if true, would most seriously weaken the conclusion about the strategies that tire retailers are using?
A. Many consumers purchase inexpensive services and products wherever they can be purchased most conveniently.
B. Because tires are sold at a high margin, no other services or products can ever replace the revenue made from tires.
C. Tire retailers have thrived even though tires have steadily become more durable and less expensive for the past 50 years.
D. Consumers often buy only two tires at a time, as tires wear out at different rates depending upon which wheel they're on.
E. Consumers who have a positive experience with a retailer tend to return to that retailer for other services and products.
Which of the following, if true, would most seriously weaken the conclusion about the strategies that tire retailers are using?
A. Many consumers purchase inexpensive services and products wherever they can be purchased most conveniently.
B. Because tires are sold at a high margin, no other services or products can ever replace the revenue made from tires.
C. Tire retailers have thrived even though tires have steadily become more durable and less expensive for the past 50 years.
D. Consumers often buy only two tires at a time, as tires wear out at different rates depending upon which wheel they're on.
E. Consumers who have a positive experience with a retailer tend to return to that retailer for other services and products.
mostly i don't complete QUANT 
