Why the cargo pump in the Framo cannot be overloaded?

A. The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, the flow is always kept constant
B. The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, the pump runs at the optimum speed
C. The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, when the pump over speeds, the flow of oil is reduced
D. The pressure of hydraulic oil to the motor driving the cargo pump is designed in such a way that, the pressure can run the pump at 75% of the capacity

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