by giladedelman Fri Jun 01, 2012 4:09 pm
Thanks for posting -- this is a tricky one!
So, as always, let's make sure to really focus on what exactly we're trying to weaken. The argument tells us that Travaillier has recently hired people with experience in bus tourism and is negotiating with charter bus companies. But we also know that its traditional customer base travels mainly by air. From these facts, the argument concludes that Travaillier must be trying to expand its business by attracting new customers.
Not a crazy argument, right? It does look like Travaillier is trying to get into the bus tourism business, and if their customers are more into air travel, one explanation is that they are trying to attract customers who travel by bus. But that's not the only explanation, and since it's our job to weaken it, we should be on the lookout for answers that suggest alternate explanations for Travaillier's behavior.
(E) fits the bill because it suggests another reason for the bus stuff: the company could be trying to expand by introducing its customers to new services, as the consultants tend to suggest. So we've undermined the argument by offering another explanation for the facts.
(A) is incorrect because it would strengthen the argument, if anything, by eliminating the type of explanation offered in answer (E): if it's hard to change customers' preferences, then maybe they are indeed trying to attract new customers.
(B) is incorrect because whether "some" other companies have tried and failed really doesn't affect whether Travaillier is trying to expand into the bus industry. We would have to add the assumption that Travaillier wouldn't try something other companies have failed at--and that's a big assumption!
(C) was tempting to me, because maybe the new hires only coincidentally have bus experience, but it still doesn't explain why Travaillier is negotiating with chartered bus companies! It doesn't help us explain this behavior, so it really doesn't affect the conclusion of the argument.
(D) is totally out of scope ... it's about "some" of their competitors, not Travaillier, and it's about the customers who spend the most, and we have no idea how that relates to customers traveling by air vs. by bus.
Does that clear this one up for you?