According to a recent report, the original tires supplied with the Imp

(D) talks about "manufacturers of other automobiles in the Impressivo’s class" , now class as we all know for can can be SUV, MUV or Hatchback or any other...

We are noway concerned about body type of cards of other manufacturers , but intersted to know about Impressivo, so (D) may be rejected.

OFFICIAL EXPLANATION

According to a recent report, the original tires supplied with the Impressivo, a new sedan-class automobile, wore much more quickly than tires conventionally wear. The report suggested two possible causes: (1) defects in the tires, and (2) improper wheel alignment of the automobile.

Which of the following would best help the authors of the report determine which of the two causes identified was responsible for the extra wear?


(A) a study in which the rate of tire wear in the Impressivo is compared to the rate of tire wear in all automobiles in the same class

(B) a study in which a second set of tires, manufactured by a different company than the one that made the first set, is installed on all Impressivos and the rate of wear is measured

(C) a study in which the level of satisfaction of workers in the Impressivo manufacturing plant is measured and compared to that of workers at other automobile manufacturing plants

(D) a study that determines how often improper wheel alignment results in major problems for manufacturers of other automobiles in the Impressivo’s class

(E) a study that determines the degree to which faulty driving techniques employed by Impressivo drivers contributed to tire wear


B

Because the report identifies two possible causes of the tire wear, the best answer must identify a study that focuses on one of these possible causes. Studies focusing on car models other than the Impressivo (A and D), worker satisfaction C, or driver error E are all irrelevant to this study. The study described in B removes one of the two possible causes. If the newly installed tires made by another manufacturer also turn out to wear abnormally, then the authors will have good reason to suspect that faulty alignment caused the initial problem. If the new tires wear normally, then they will know that the original tires were faulty.

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