Question ID:PT49 S2 Q6 Passage:The cattle egret is a bird that lives around herds of cattle. The only available explanation of the fact that the cattle egret follows cattle herds is that the egrets consume the insects stirred up from the grasses as the cattle herds graze. Stem:Which one of the following, if true, would most seriously undermine the claim that the explanation given above is the only available one? Correct Answer Choice:CChoice A:Birds other than cattle egrets have been observed consuming insects stirred up by the movement of cattle. Choice B:Cattle egrets are known to follow other slow-moving animals, such as rhinoceroses and buffalo. Choice C:The presence of cattle dissuades many would-be predators of the cattle egret. Choice D:Cattle egrets are not generally known to live outside the range of large, slow-moving animals. Choice E:Forests are generally inhospitable to cattle egrets because of a lack of insects of the kind egrets can consume.