A current made of which water would be a surface current?

A.

cold water with low salt content

B.

warm water with high salt content

C.

cold water with high salt content

D.

warm water with low salt content

Well a surface current is like ocean currents. The water is dense and with density comes cold water. The salt level in said water is pretty low like 3. something% with the rest being fresh water. I can't say that I'm 100% positive, but that's what I know. So A