单选题The lubrication to the cylinders affected by the fire must be （）to prevent seizure and all scavenge drains must be （）to prevent the discharge of sparks and burning oil from the drains into the engine room.Adecreased；openedBdecreased；shutCincreased；openedDincreased；shut
单选题
The lubrication to the cylinders affected by the fire must be （）to prevent seizure and all scavenge drains must be （）to prevent the discharge of sparks and burning oil from the drains into the engine room.
A
decreased；opened
B
decreased；shut
C
increased；opened
D
increased；shut
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