求答案呀，这个题是选择A还是C呀？？？？

mike125615212

17. GWD30-Q17:
By thesame techniques used for genetically enhancing plants, making them disease-or pest-resistant, researchers have been able to increase the amount of proteinin potatoes, sweet potatoes, and tobacco.

A.   By the same techniques used for genetically enhancing plants, making them
B.   With the same techniquesto genetically enhance plants, so that they are       they指代plants或者techniques
C.   ！Employing the same techniques used togenetically enhance plants so that they are
D.   Employing the same techniques to geneticallyenhance plants, which makes them
E.    Employing the same techniques forgenetically enhancing plants that make them

jannyguo

A

By the same techniques used for genetically enhancing plants, making them(plants)

Employing the same techniques used togenetically enhance plants so that they(techniques) are

西瓜味酸奶

感觉是c吧。

hookem09

Its C

mike125615212

感觉是c吧。

-- by 会员 西瓜味酸奶 (2012/3/19 21:01:25)

如果是c为什么they没有指代歧义呢？

mike125615212

Its C

-- by 会员 hookem09 (2012/3/19 21:22:24)

如果是c为什么they没有指代歧义呢？