大全-test19-15题目已贴在楼里，请助拳

Over the last century, paleontologists have used small differences between fossil specimens to classify triceratops into sixteen species. This classification is unjustified, however, since the specimens used to distinguish 11 of the species come from animals that lived in the same area at the same time.

Which of the following, if true, would enable the conclusion of the argument to be properly drawn?

C. No geographical area ever supports more than 3 similar species at the same time.

这是什么假设啊……

可否麻煩樓主註明此題的出處，一来方便讨论解题,二来方便搜索查找功能,谢谢唷!!

請參考

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携隐

Already corrected. So sorry ......