[求助] 一道GWD SC

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C。IMO D。D如果用 "by" instead of "as a result of" 就更好，但搞不懂C。不应该是water layers dissipate acoustic energy 么？但选项prevent from dissipating不是被动啊。

谢谢。