求助谁来明确下这题答案？

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