OG上的一道题，麻烦指点一下，谢谢！！

双双儿 · 发表于 2017-10-28 19:15:21

Over the next few years, increasing demands on the Chattahoochee River, which flows into the Apalachicola River, could alter the saline content of Apalachicola Bay, which would rob the oysters there of their flavor, and to make them decrease in size, less distinctive, and less in demand.
(A) which would rob the oysters there of their flavor, and to make them decrease in size,

(B) and it would rob the oysters there of their flavor, make them smaller,
(C) and rob the oysters there of their flavor, making them decrease in size,
(D) robbing the oysters there of their ﬂavor and making them smaller,
(E) robbing the oysters there of their ﬂavor, and making them decrease in size,

答案D

OG对此题的解释为：
A.which的指代ambiguous
B.it指代ambiguous。Also, the eﬀects of the bay's altered saline content are not expressed in parallel frmthe frst being an independent clause and the second a verb phrase
C.rob和make不平行
E.make后三部分不平行

我的问题是：
1.A的which为什么ambiguous？
2.B中的it为什么ambiguous？
3.B解释中为什么说一个是句子一个是动词短语，在我看来一个是rob the oysters there of their flavor，一个是make them smaller，都是动词短语呀。这怎么解释呢？
4.E答案中的第一个逗号多余吗？这是不是一个错误点？还是and+Ving前有没有逗号无关紧要呢？

拜托各位了

krystalchenkkk · 发表于 2017-10-28 19:27:44

which只能指代逗号前面的名词，在这里只能指代那个Bay，也就是变成了Apalachicola Bay would rob the oysters there of their flavor
但是实际上导致这个结果的原因应该是increasing demands，所以A错。
it不知道在指代什么，反正指代不了increasing demands，所以也是错的。
答案的意思应该是前面是" it would rob the oysters there of their flavor",后面是“make them smaller”
这两个之间必须要有AND连接的。
逗号多余，三者并列才需要逗号，两者不需要

双双儿 · 发表于 2017-10-28 20:07:15

krystalchenkkk 发表于 2017-10-28 19:27
which只能指代逗号前面的名词，在这里只能指代那个Bay，也就是变成了Apalachicola Bay would rob the oyste ...

thank you！！☺

[SC悬赏令] OG上的一道题，麻烦指点一下，谢谢！！

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