I understand that (c) is a better answer choice than (b), but I couldn't rule (b) out either. Isn't the direction of public policy out of scope with regards to the stimulus? Is there something in the passage that I am missing here? Many thanks in advance!
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To me, answer choice was E wrong, because the stimulus talks about most species of ants. We can't push a valid inference about Saharan ants because we don't know if they fall in the category of "most species of ants" or not.