If a hydraulic governor has been refilled with oil...

If a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperaturethen the air should be purged, and the_________.A.rack position should be adjustedB.compensating needle valve should be opened fully compensatingC.needle valve should be adjusted to stabilize operationD.speed limiting device should be adjusted请帮忙给出正确答案和分析，谢谢！