题目内容：
The reason why the electric eel is able to give more powerful shock is that__________.
A．compared with those in the torpedo, the working system of electric plates in the eel is more direct and efficient B．compared with other electric fish, the eel possesses much more electric plates
C．the working system of the electric plates in the eel is far inferior to those in the torpedo
D．the working system of the electric plates in the eel is the most effective
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