Critical Reasoning (CR) | Re: So-called environmentalists have argued that the proposed

OE from Kaplan:

For all the verbiage of the question stem, all we really need to do is to find the assumption that will make the author’s argument valid, and we’ve already seen from the previous question what’s missing from the argument: The author questions the environmentalists’ argument against the development on the basis of the fact that they’ve objected to just about every other development plan in the past, but we don’t know if these were valid objections or not because we don’t
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