【单选题】
A A.Fuel quantity low in the main tank, impending fuel filter bypass, excessive fuel flow difference between engines
B B.Fuel quantity low in the main tank, both center tank fuel pumps producing low or no pressure with fuel in the center tank, excessive fuel quantity difference between main tanks
C C.Fuel quantity low in center or main tank, either center tank fuel pump producing low or no pressure with fuel in center tank, excessive fuel flow difference between engines
D D.Any fuel pump producing low or no pressure with the pump switch ON, impending fuel filter bypass, excessive fuel quantity difference between main tanks.
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