An emergency bilge pumping system is provided and should be （） of the main bilge pumping system, according to the SOLAS 74 Convention.

A.one-third
B.two-thirds
C.one-fourth
D.two-fourths

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