The company states that the deterioration is caused by misuse: the product is made for sport cars but is used improperly, so it brokes and consumers complain.
Knowing which of the following would best help to evaluate the rim company’s claim?
(A)Do the rims come with a warranty?Out of scope.
(B)What percentage of rims produced by the company is used on vehicles other than sports cars?This might sounds tempting. However we can rewrite this as "what percentage of rims is used improperly", and this info will not help us to evaluate weather the rims are poorly made.
(C)Do rims produced by the company’s main rival have a longer useful life than rims produced by the company?We are looking the evaluate the company’s claim, and info about its rival does not help us.
(D)Do rims produced by the company deteriorate faster when they are used on SUVs or when they are used on minivans?Since both SUVs and minivans are in the "misuse" area, this does not help us.
(E)Did customers who have complained about rim quality use them on sports cars or on other types of vehicles?CORRECT. If we know the answer to this question we can easily see weather what causes deterioration is misuse or poor quality.