GWD26-37

Sound can travel through water for enormous distances,

prevented from dissipating its acoustic energy as a result of

boundaries in the ocean created by water layers of different

temperatures and densities.

A.      prevented from dissipating its acoustic energy as a

result of

B.  prevented from having its acoustic energy dissipated by

C.  its acoustic energy prevented from dissipating by

D.  its acoustic energy prevented from being dissipated as

a result of

E   preventing its acoustic energy from dissipating by

答案是E , 但我不太明白为什么选E , 这个分词短语是修饰前面一句话的吗? 这两个句子的逻辑意思好像有点问题, ｐｒｅｖｅｎｔ　为什么不用被动, 难道声音自己可以prevent

请大家赐教