286 If it is necessary to operate a turbine driven main feed pump at shut off head, or at less than 20% of its rated capacity, what will prevent the pump from overheating?

A. Throttling of the steam supply valve.
B. Throttling of the liquid discharge valve.
C. A bypass or recirculating line led back to the pump impeller eye or suction.
D. A bypass or recirculating line led back to the source of suction supply.