[求助]prep1-165

165.         (33893-!-item-!-188;#058&007190)

Due to poaching and increased cultivation in their native habitats, researchers have determined that there are fewer than 100 Arabian leopards left in the wild, and that these leopards are thus many times as rare as China's giant pandas.

(A) Due to poaching and increased cultivation in their native habitats, researchers have determined that there are fewer than 100 Arabian leopards left in the wild, and that these leopards are thus many times as rare as

(B) Due to poaching and increased cultivation in their native habitats, there are fewer than 100 Arabian leopards left in the wild, researchers have determined, making them many times more rare than

(C) There are fewer than 100 Arabian leopards left in the wild due to poaching and increased cultivation in their native habitats, researchers have determined, which makes the leopards many times more rare compared to

(D) Researchers have determined that, because of being poached and increased cultivation in their native habitats, there are fewer than 100 Arabian leopards left in the wild, thus making them many more times as rare as

(E) Researchers have determined that, because of poaching and increased cultivation in their native habitats, there are fewer than 100 Arabian leopards left in the wild, and that these leopards are thus many times more rare than

答案是E，可是怎么看那个their也是指代错误啊，代词不是应该优先指代主句主语吗？那不应该指代researcher了？

笔记上说B是making有歧义，可是这里分词不可以做伴随结果状语吗？不需要有逻辑主语啊。就算有可能有歧义，至少E错的更离谱吧？

至于researchers have determined 是插入语吗？会产生什么歧义？

看了以前的讨论，没人问这个。。请教下。。谢啦

B项reserchers have determined 主谓都有，是句子不可认为是插入语。用逗号直接连接两个句子，为语法大忌。

E项 Because of部分作原因状语，去掉后句子就清楚了：  Researchers have determined that there are fewer than 100 Arabian leopards.....and that these leopards ...完美的并列