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freedom128
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nikitathegreat
Can someone explain why option D is incorrect? If they produce very small amounts of methane then the atmosphere will not have much effect

D says that ‘some’ produce very small amounts of methane, now we don’t know how much this ‘some’ means. It can be 1% or it can be 20%. Also even if some living beings produce very small amounts of methane, it doesn’t weaken the conclusion that methane is getting replenished.

B says that Not all living beings are capable of producing methane which suggests that there might be living beings present despite absence of methane in the atmosphere. This weakens the conclusion.

Hope it helps.

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Why is C wrong? Can you walk through how you eliminated the other answer choices? Thank you!
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Why is C wrong? Can you walk through how you eliminated the other answer choices? Thank you!

Even if C is true, it doesn’t weaken the argument that determining presence of methane would be the most reliable method. Just because at present we are incapable doesn’t help conclude about the reliability of a method.

A is wrong because even if there are other ways , it doesn’t imply that determining methane presence is not the most reliable method. There can be other methods and methane method can still be the best.

E is wrong for the same reasons. Even if E is true, conclusion isn’t weakened. You can still say methane method is most reliant and find no methane in the planet’s atmosphere, and the conclusion will still hold.

Reasons for D is mentioned in my above post.

Hope this helps.

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