Critical Reasoning

Economist: The marketing department for a certain brand of dish washing liquid claims that its product, a soap which removes dried-on grease 30 percent more effectively, will quickly become the best-selling dish washing liquid in its class. However, as the failure of the pharmaceutical start-up that developed the unprecedentedly strong pain reliever HURT-AWAY demonstrated last year, customers often care more about the perceived trustworthiness of a brand as they do about the efficacy of a particular product.

Which of the following strategies is used in the economist's argument?

A
Suggesting that the motives of an opponent are dubious
B
Supporting another's position by means of a case study
C
Challenging an argument by means of an analogy
D
Demonstrating contradictions in the evidence supporting an opposing position
E
Pointing out how a plan is unsuitable given the cultural contexts of a market