hey_thr67 wrote:82. 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


[spoiler]OA is C but not E. Why ? [/spoiler]

alex.gellatly wrote:

hey_thr67 wrote:82. 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


[spoiler]OA is C but not E. Why ? [/spoiler]

I was on the fence between C and E for a few seconds myself, then went with C because in E the -ing form seems to say that sound is preventing its own acoustic energy which is simply illogical. We want to say that sound can move fast because its energy is prevented from.... and that's exactly what C does (in fancier language, of course)