GMAT Critical Reasoning (CR) | Re: Nitrogen triiodide is a highly explosive chemical that is easy to

KS15 , answer A requires quite a few assumptions in order to serve as an explanation. Do we know that "somewhat restricted" sources are riskier or more difficult to buy from? Do we know that there are other, less risky, options? Couldn't someone steal the iodine? Would these considerations really deter a potential wrongdoer? We can see why it might be mildly challenging to collect the needed ingredient, but that's a far cry from showing us whyno one has ever used this substance, and that
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