The fire pumps must be capable of delivering a total quantity of water at a defined head, not less than （） of the total bilge pumping capacity.

A.Classification Society Rules
B.National requirements
C.The IMO International Convention for the Safety of Life at Sea
D.All of the above

A.low pressure at all times
B.full pressure at all times
C.low pressure at intermittence
D.full pressure at intermittence

A.an auxiliary reservoir
B.a controlling air bottle
C.an emergency air compressor
D.a main air compressor