Carl: Researchers who perform operations on animals for experimental purposes are legally required to complete detailed pain protocols indicating whether the animals will be at risk of pain and, if so, what step will be taken to minimize or alleviate it. Yet when human beings undergo operations, such protocols are never required. If lawmakers were as concerned about human beings as they seem to be about animals, there would be pain protocols for human beings.
Debbie: But consider this: a person for whom a doctor wants to schedule surgery can simply be told what pain to expect and can then decide whether or not to undergo the operation. So you see, pain protocols are unnecessary for human beings.
Debbie attempts to counter Carl’s argument by
Carl: Pain protocols for animal
But, This does not apply to human.
If humans are concerned by lawmakers -> Pain protocol for human being
Debbie: But, Humans -> told by doctors about pain -> Pain protocol for human being = unnecessary
So what is going on here? Debbie refute Carl's conclusion that Pain protocol is necessary by contrasting the difference between humans and animal. Humans are able to understand whether the process will be painful; in contrast, Animals aren't not able to do so. There, Pain protocols are unnecessary for humans.
There is no new information here. So Debbie did not attack the Carls' argument by providing new information, rather he evaluates Carl's premises.
Let's check out the options
Quote:
(A) showing that one of the claims on which Carl bases his conclusion is inaccurate
He did not state that the premises are inaccurate. He explained that the two premises are different to each other a certain extent. (A) is out.
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(B) pointing out a relevant difference to undermine an analogy on which Carl bases his conclusion
This matches our thought. Hang on to this.
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(C) claiming that Carl’s argument should be rejected because it is based on an appeal to sentimentality rather than on reasoned principles
Carl's conclusion is not based on an appeal to sentimentality, but rather on reasoned principles. This choice states the opposite. (C) is out.
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(D) drawing an analogy that illustrates a major flaw in Carl’s argument
Debbie did not state that Carl's argument is flaw. Furthermore, he did not draw an analogy. Instead, he elaborate Carl's analogy by comparing the subjects.
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(E) offering a specific example to demonstrate that Carl’s argument is based on a claim that can be neither confirmed nor disproved
Did he offer any specific example? No he did not.
Only B is left. (B) is the correct answer.