[求助]还是代词的指代产生歧义的问题

请比较下面两题：

GWD30-Q17:

By the same techniques used for genetically enhancing plants, making them disease- or pest-resistant, researchers have been able to increase the amount of protein in potatoes, sweet potatoes, and tobacco.

A.      By the same techniques used for genetically enhancing plants, making them

B.       With the same techniques to genetically enhance plants, so that they are

C.      Employing the same techniques used to genetically enhance plants so that they are

D.      Employing the same techniques to genetically enhance plants, which makes them

E.       Employing the same techniques for genetically enhancing plants that make them    答案：C

我知道所有的选项都有they或them这样就不必关心代词的到底指代谁的问题了，这个they从逻辑上讲显然指plants，但是有的题却不管逻辑意思，非要指代清楚才行，请看下题：

As researchers continue to probe the highly expressive vocal and postural language of wolves, their close resemblance to dogs has become ever more striking.

(A) their close resemblance to dogs has become

(B) the closeness of their resemblance to dogs has become

(C) the close resemblance between them and dogs has become

(D) the close resemblance between wolves and dogs becomes（D）
            

(E) the close resemblance of wolves with dogs becomes

这里也可以说不能是researchers像狗狗而是狼像狗啊，根据逻辑意思their不也应该指代狼吗？这是怎么回事呢？

我个人揣测因为Employing the same techniques used to genetically enhance plants so that they are并不是一个完整的句子，因此they优先指代临近他的名词，而As researchers continue to probe the highly expressive vocal and postural language of wolves已经是一个分句了。这时后面若有代词就应优先指代前面的主语即researchers，但是句子原意是让其指代狼，因此才有所区分，不知道是不是这样啊？？？

请NN指点迷津。

这里也可以说不能是researchers像狗狗而是狼像狗啊，根据逻辑意思their不也应该指代狼吗？这是怎么回事呢？

我个人揣测因为Employing the same techniques used to genetically enhance plants so that they are并不是一个完整的句子，因此they优先指代临近他的名词，而As researchers continue to probe the highly expressive vocal and postural language of wolves已经是一个分句了。这时后面若有代词就应优先指代前面的主语即researchers，但是句子原意是让其指代狼，因此才有所区分，不知道是不是这样啊？？？

请NN指点迷津。

顶

代词可以指代前面句子的主语宾语，但是一般不好指代前面句子的定语。

第一个例子里面的they指代的是前面句子中的宾语plants，是可以的；狗狗狼狼这个例子里面A选项的their是想指代wolves，而wolves在前面的句子里是launguage的定语，所以不好用their来指代wolves。

谢楼上的啦。第二个例子我明白了。只是第一个例子里they不是有优先指代主语之说吗？如果指代主语不就错了吗？

不客气。

从句主语优先指代主句主语，但是也可以指代主句宾语，看句子和上下文。

但是如果从句的主语是省略的，那么这个省略的从句主语，只能指向主句的主语。