[求助]-ing啊-ing，OG12-65

OG12-65

In a plan to stop the erosion of East Coast beaches,the Army Crops of Engineers proposed building parrel to shore a breakwater of rocks that would rise six feet above the waterline and act as a buffer,so that it absorbs the energy of crashing waves and protecting the beaches.

a.act as a buffer,so that it absorbs

b.act like a buffer so as to absorb

c.act as a buffer,absorbing

d.acting as a buffer,absorbing

e acting like a buffer,absorb

这个题选C没有问题。。。但是有点不明白啊。。。。

如果不看后面的protecting平行结构。。。

absorbing的逻辑主语等于句子主语。。那会不会指代到主句上的主语，产生混淆呢？

分词的用法好不明白啊。。。。

有童鞋可以帮忙解答吗。。。谢谢啊。。。。

同意楼上的说法，认为absorbing是表示结果的！！

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明白了！谢谢大家！