请教关于 一道 关于based on的题

RichardGong

161.    Based on the growth rates of large modern reptiles such as the Galapagos tortoise and examinations of fossils of juvenile dinosaurs, scientists estimate that the largest dinosaurs probably lived to be between 100 and 200 years old.
(A) Based on the growth rates of large modern reptiles such as
(B) On the basis of growth rates of large modern reptiles such as
(C) Based on the growth rates of large modern reptiles like
(D) On the basis of growth rates of large modern reptiles, like those of
(E) Based on such growth rates as those of large modern reptiles like


OA is B. 但是A为什么不行呢？ 今天刚刚看了经济学家上一篇文章，专门有一句以Based on开头，主句主语是they的句子。

Based on the medieval descriptions of the dark spots on the skin that gave the Black Death its name, they suggested the epidemic was actually a viral haemorrhagic fever, similar to modern Ebola.

http://www.economist.com/blogs/babbage/2011/10/medical-archaeology 第三段最后一句就是。 难道经济学家上的文章也不是符合gamt语法啊？？

谢谢各位大虾。。。还望牛人多指点！！

RichardGong

哦，明白了。。。记得说过即使GMAT阅读考试里面的文章也未必符合gmat语法的。