单选题While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）ADelivery check valveBPump barrelCTubing to the injectorDCam follower
单选题
While overhauling a jerk-type fuel pump it is necessary to replace the pump plungerWhich of the parts listed below must also be replaced?（）
A
Delivery check valve
B
Pump barrel
C
Tubing to the injector
D
Cam follower
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