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みなさん、お世話になります。CRでまた悩んでます。
訳がわからないわけではないのですが、正解に納得できません。
とりあえず、私の解釈を記載しますので、どなたかサポートいただけるとありがたいです。
Some species of dolphins find their prey by echolocation; they emit clicking sounds and listen for echoes returning from distant objects in the water. Marine biologists have speculated that those same clicking sounds might have a second function: particularly loud clicks might be used by the dolphins to stun their prey at close range through sensory overload.
もしかしたら、解釈ミスかもしれません。:以下をどなたか正確に訳していただけないでしょうか？
Which of the following, if discovered to be true, would cast the most serious doubt on the correctness of the speculation described above?
この問題できいているのは、第二の機能(=stun)に関する推測の妥当性だと認識しました。
A)Dolphins that use echolocation to locate distant prey also emit frequent clicks at intermediate distances as they close in on their prey.
議論に無関係。
B)The usefulness of echolocation as a means of locating prey depends on the clicking sounds being of a type that the prey is incapable of perceiving, regardless of volume.
正解。納得いきません。
相手を気絶させることに無関係だと思います。
C)If dolphins stun their prey, the effect is bound to be so temporary that stunning from far away, even if possible, would be ineffective.
遠くでstunすることに意味はない→本文に無関係
D)Echolocation appears to give dolphins that use it information about the richness of a source of food as well as about its direction.
E)The more distant a dolphin's prey, the louder the echolocation clicks must be if they are to reveal the prey's presence to the hunting dolphin.
DEは第一の機能（＝獲物を探す）についての記述であり、無関係。
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