As engine RPM is increased from idle speed to full load speed, which of the conditions listed will decrease?（）

A.test the starting system
B.remove condensation from the cylinders
C.check the compression
D.check for proper lube oil pressure

A.turn the flywheel
B.reduce friction
C.overcome inertia
D.ignite the fuel

A.lower compression pressures
B.overheating without smoking
C.failure to start
D.a run away without load