Quote:
Worldwide retail sales of home entertainment systems, which include a television and an audio system, increased twenty-five percent this year over last year. At the same time worldwide retail sales of new automobiles declined by about the same percent. These statistics show that consumers can no longer afford to purchase both types of products during the same year.
Which of the following, if true, would cast most serious doubt on the conclusion drawn above?
A. Fewer advertisements for new cars appeared on television during the most recent year than during the previous year.
B. Consumers are spending more money on home entertainment systems than on new cars.
C. People who own home entertainment systems do not drive their automobiles as often as other people.
D. Prices of home entertainment systems and new cars were higher during the most recent year than during the previous year.
E. The reliability of automobiles this year improved significantly over last year.
ARGUMENT
[prem] sales of home systems +25% yoy, and sales of new cars -25% yoy;
[con] consumers can no longer afford to purchase both products during same year.
WEAKEN
A. what if there were also fewer ads of home systems? irrelevant;
B. if they'r spending more on home than on car, this could mean they cannot afford both;
C. do not drive doesnt mean they buy more or less cars;
D. irrelevant;
Ans (E) this weakens - consumers dont need to buy new cars because their old ones are very reliable.