Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.<br>A:increasing the volume of intake air<br>B:shutting off the fuel supply<br>C:increasing the engine back pressure<br>D:over-speeding the engine

Electrically operated safety devices on auxiliary diesel engines function to stop the engine by （）.
A:increasing the volume of intake air
B:shutting off the fuel supply
C:increasing the engine back pressure
D:over-speeding the engine

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