Australian embryologists have found evidence that suggests that the elephant is descended from an aquatic animal, and its trunk originally evolved as a kind of snorkel.

(a)..
(b) that has suggested the elephant descended from an aquatic animal, its trunk originally evolving
(c)suggesting that the elephant had descended from an aquatic animal with its trunk originally evolving
(d) to suggest that the elephant had descended from an aquatic animal and its trunk originally evolving
(e) to suggest that the elephant is descended from an aquatic animal and that its trunk originally evolved

答案是A

对于C的解释有点不理解：

prep语法笔记上说：with部分结构错误

这是错在哪了？独立主格不是可以的吗？

表伴随时，既可用分词的独立结构，也可用with的复合结构。
with +名词(代词)+现在分词/过去分词/形容词/副词/不定式/介词短语

答案是E。

C第一眼看到用过去完成时态就应该排除掉。

with 部分应该用evolved,因为这里表达的是被动。鼻子被用来做为一种通气管。

E,怎么打成A了

谢谢zengzihao

好像明白了。。。

with +名词(代词)+现在分词/过去分词/形容词/副词/不定式/介词短语

并不是说现在分词短语，过去分词短语，形容词短语，副词短语，不定式短语。

只说了“介词短语”。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。。