The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to （）.<br>A:assist in a quick cutoff of fuel injection<br>B:allow oil backflow from the injector to the helix<br>C:reduce fuel oil pressure between injection strokes<br>D:meter the quantity of fuel delivered

The purpose of the delivery check valve used in a diesel fuel injection jerk pump is to （）.
A:assist in a quick cutoff of fuel injection
B:allow oil backflow from the injector to the helix
C:reduce fuel oil pressure between injection strokes
D:meter the quantity of fuel delivered

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