Company spokesperson: Household Products magazine claims that our Filterator X water filter does not remove chemical contaminants in significant amounts. This attack on the quality of our product is undermined by the experience of who are satisfied with the product's performance.
What this question is testing
Your task
Find the choice that makes the argument's conclusion less likely to be true.
Common trap
Answers that look negative but attack a claim the argument never relied on.
Winning move
Find the assumption the argument depends on, then pick the choice that undermines it.
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