medium · LSAT Logical Reasoning

Nations with lower per-capita carbon emissions tend to invest more heavily in public transit than nations with higher emissions. From this, a policy analyst concludes that increasing investment in public transit is the most effective way for any country to bring its emissions down.

Which one of the following most accurately describes a flaw in the analyst's reasoning?

  1. It treats a strategy associated with lower emissions across nations on average as the single best emissions-cutting tool for each nation individually.
  2. It does not define the metric of per-capita carbon emissions precisely enough to permit fully valid comparisons across many quite different countries.
  3. It disregards the possibility that the public transit vehicles themselves are, in routine daily operation, meaningful direct emitters of carbon.
  4. It supposes that the nations now investing heavily in public transit must be doing so solely out of a genuine concern for environmental motives.
  5. It assumes that the low-emission nations would each cut their own emissions still further if only they invested even more in public transit.

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