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Parallel Flaw-CE. The correct answer choice is (C)
This Parallel question uses causal reasoning, but concludes that the cause does not work. Antitheft devices do not have their intended cause of deterring theft. We should first look for an answer that involves causal reasoning and concludes that the cause does not produce the intended effect.
Answer choice (A): Although this answer choice seems to involve causal reasoning, it does not conclude that a cause does not produce an intended effect based on these surveys. Its conclusion does not match the stimulus's conclusion at all.
Answer choice (B): There does not appear to be any cause and effect reasoning in this answer choice. The conclusion is about who the library is intended to serve based on its collection. We do not know if this intention is successful or not (which is what the conclusion of the stimulus concerns). Again, if you Double the Conclusion, you will see that this conclusion does not match.
Answer choice (C): This is the correct answer choice, as it follows the pattern of reasoning present in the stimulus. It presents a study (notice that the parts of the argument need to match — the stimulus presents statistics) that seems to contradict common sense. Then, it concludes that one effect libraries may be intended or thought to produce does not occur.
Answer choice (D): The conclusion here: ("children who do not like to read usually have perfect vision") besides being ridiculous, does not match the "do not protect" of the stimulus at all. Although this is extremely flawed reasoning, it does not match the reasoning of the stimulus.
Answer choice (E): This answer choice postulates a cause and effect relationship, but it never claims that an intended or commonsense effect does not occur like the conclusion of the stimulus does.