讨论一个题目

6．Although the bite of brown recluse spiders are rarely fatal, they cause chronic flesh wounds, posing the greatest danger to the infant and elderly, who are particularly vulnerable to its poison.
(A) brown recluse spiders are rarely fatal, they cause chronic flesh wounds, posing the greatest danger to the infant and elderly, who are particularly vulnerable to its
(B) brown recluse spiders are rarely fatal, they cause chronic flesh wounds, posing the greatest danger to the infant and elderly, who are particularly vulnerable to their
(C) the brown recluse spider is rarely fatal,it causes chronic flesh wounds, posing the greatest danger to the infant and elderly, who are particularly vulnerable to their
(D) the brown recluse spider is rarely fatal, it causes chronic flesh wounds, posing the greatest danger to the infant and elderly, who are particularly vulnerable to its
(E) the brown recluse spider is rarely fatal, they cause chronic

这个题目，我在C和D之间犹豫了很久，我觉得应该选D，为什么呢？ 最后从句结尾的poison在逻辑上应该是Spiders的poison,而不是bite的poison.可能是想绕了，大家给我解释一下吧。