According to this passage, the sea _________ is likely to have the lowest salinity.

A．is a good example of increased salinity in freezing sea water
B．is much larger in area than the Arctic oceans
C．has a much lower salinity now than ever
D．has the denser water in its upper parts

A．the developing countries which used to be colonies
B．the former British colonies which now are developing
C．the colonized countries which become as strong as Britain
D．the developing countries which are still colonized by Britain