the part that concerns me about AC E is that it says the hypothalamus is not causally linked to the whole group of diseases; the explanation claims that AC E suggests the interstitial nucleus isn't a cause of disease X, thereby weakening the argument; but the stimulus doesn't imply that a large interstitial nucleus is the cause of Disease X, rather it implies that having a large interstitial nucleus makes a male cat susceptible to Disease X, whereas a cat without such a large interstitial nucleus would not be susceptible; and those cats with large interstitial nuclei may contract Disease X, through whatever vector or mechanism the disease is transmitted like a virus or genetic expression. Basically, "determines whether or not [they] can contract disease X" has different implications than saying "determines whether or not [they] will contract disease X". I'm happy to acknowledge that my selection of another answer was a failure to identify an incorrect answer, and maybe my thought process entertained too much biology, but I'm troubled by what I find to be very loose wording on this question; I've found other LSAC questions to be extremely stringent in interpretation of these kinds of phrases, and am surprised to have this question not express that same stringency.