GMAT Critical Reasoning (CR) | Re: Throughout much of its fifty-year history,

this is a causal argument - so we need to find an alternate cause to weaken this argument

how about - price increase of the beef forced people to eat more grain? or people switched from beef to grain because of better health awareness

or worldwide there was beef infection going on, causing the fear among the resident

Clearly, the Dischordian grain initiative is what brought about this change.

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