Having trouble with the negation of b. The stimulus specifies a comprehensive international solution, but B extends the requirement to any comprehensive solution. I took that to mean international or otherwise, so was conflicted in choosing B. Are we expected to just assume the international part in this answer choice since we're talking about more than one nation? This makes sense to me as a person irl but my LSAT brain had me suspicious

@Dylan_Rispoli but doesn't the conclusion still follow if no trad fish die due to timidity in foraging and instead the trad fish die because they're too timid in exploring new environments? Like if the trad fish die bc they don't explore to the extent that the experimental fish do and thus don't find effective shelter? The experimental fish have more than one leg up on the traditional fish so the argument can't fall apart just because one of these advantages doesn't improve their survival rate in the wild.

I see how C is correct for a sufficient assumption question, but I'm struggling to see how this assumption is necessary.