Advertisement: Over 80 percent of the people who test–drive a Zenith car end up buying one. So be warned: you should ...

medasmx@protonmail.com on December 16, 2021

why not B

I think B casts doubt because it says that the people decide to buy the car before they take the test drive. So it is not the test drive but the variety of cars on the lot that account for the quick decision.

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Emil-Kunkin on January 17, 2022

Hi @medasmx, answe choice B gives us the info that dealers have enough variety in stock that once a customer has test driven and decided to buy, they will be able to do so. Essentially, this tells us that dealers remove a potential obstacle to conducting a test drive. This does not cast doubt on the idea that the test drive is unusually impressive. Rather, it tells us that dealers are able to meet demand for test drives. We are never told that lack of the exact car is a hindrance however.

C offers us a much stronger weaken, that the 80% number is flawed since it comes from an unrepresentative sample, and that therefore doing a test drive does not cause one to buy, it merely confirms a preexisting predisposition to buying.