An axial piston, variable stroke pump is used in a vessels hydraulic steering gearUnder pressure, oil continually leaks out from between the valve plate/cylinder barrel and will（）.
A. cause loss of hydraulic oil from the system
B. result in extreme damage to the pump
C. cause damage to the pump ff not continually drained from the pump casing
D. result in the system high side pressure to substantially drop off
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