求助狒狒逻辑一道题24

sky星星在唱歌

24. Theinterstitial nucleus, a subregion of the brain’s hypothalamus, is typicallysmaller for male cats than for female cats. A neurobiologist performedautopsies on male cats who died from disease X, a disease affecting no morethan .05 percent of male cats, and found that these male cats had interstitialnuclei that were as large as those generally found in female cats. Thus, thesize of the interstitial nucleus determines whether or not male cats cancontract disease X.

Which one of thefollowing statements, if true, most seriously weakens the argument?

(A) No female catshave been known to contract disease X, which is a subtype of disease Y.

(B) Many male catswho contract disease X also contract disease Z, the cause of which is unknown.

(C) theinterstitial nuclei of female cats who contact disease X are larger than thoseof female cats who do not contract disease X.

(D) Of 1,000autopsies on male cats who did not contract disease X, 5 revealed interstitialnuclei larger than those of the average male cat.

(E) Thehypothalamus is known not to be causally linked to disease Y, and disease X isa subtype of disease Y.

此题答案是E我能理解，但是D选项感觉也对啊，没感染的male cats的interstitial nuclei也大于平均水平，不是weaken吗？？？求大神帮助~~~~~~~~~~~