再问167，关于单数复数比较的问题

Xclann

回ls

Neanderthals had a vocal tract that resembled those of the apes and so were probably without language, a shortcoming that may explain why they were supplanted by our own species.

中they应指代前句主语，而且without language也说明是某动物/人作主语。因此逻辑上，用vocal tract做主语解释不通。这只是我的理解。不对之处请指正。

laladu101

看了大家的讨论，我个人觉得这道题可以不必纠结于单复数的问题
我是这么想的
刚开始溜了一遍选项,发现主语有不同,AB的主语是Neanderthals,而 CDE的主语是tract.但是文中未划线部分提示了so were probably without language, a shortcoming that may explain why they were supplanted by our own species.
通过were和后面的they were supplanted by our species,可以推测，主语一定是复数且是个物种，才能与后面有比较。这样只有AB可以。
且A中Neanderthals had a vocal tract that resembled those of the apes
those其实想指代tract,但是前面明明是单数，后面就成了复数指代了。所以B好。

欢迎大家指教