求解释GWD-8-Q34

bobo1990

Fossils of the arm of a sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of the Greater Antilles islands.

A.sloth found in Puerto Rico in 1991, and dated at 34 million years old, made it the earliest known mammal of

B.sloth, that they found in Puerto Rico in 1991, has been dated at 34 million years old, thus making it the earliest mammal known on

C.sloth that was found in Puerto Rico in 1991, was dated at 34 million years old, making this the earliest known mammal of

D.sloth, found in Puerto Rico in 1991, have been dated at 34 million years old, making the sloth the earliest known mammal on

E.sloth which, found in Puerto Rico in 1991, was dated at 34 million years old, made the sloth the earliest known mammal of
这道题选D          A错在哪了？   如果把it改成the sloth的话A对吗？？             大家帮帮我呀~~~~~~~~~~~

bobo1990

帮帮我吧~~~~~~~

silent7706

Hi,IMO, there are at least two problems with A)


1st: "and dated at 34 million years old"
Which part of the sentence does this phrase modify? If we follow the rule of parallelism, it should modify sloth, since "dated" is made to paralleled to "found". However, it doesn't really make sense to say that the sloth is 34million years old. Fossiles can be 34m years old, but a sloth can't be.


2nd: let's take a closer look at the 1st part of A). "fossils of a sloth found..., and dated at 34m yrs..." This writing style is really awkward, and GMAT hates it. It will be much better to write "Fossils of a sloth found in PR in 1991 and dated at 34 m yrs old" instead of "Fossils of a sloth found..., and dated at...". This is a writing style issue, so make sure that you understand what kind of styles that GMAT likes and hates.


Hope this help!

bobo1990

明白了！   不甚感激！