Where would the temperature of the ocean's surface water be the lowest? (a) areas close to the equator (b) areas with a low density (c) areas with a high salinity (d) areas at high latitudes

C: Areas with a high salinity

Explanation:

A person who answered this question to another person suggested it. his explanation was:

"The higher the density of the ocean water, the lower will be the temperature. The highly saline ocean water thus exists in the polar regions than the tropic regions. Due to high density the cold water seeps down and thus it further becomes cooler while a low density ocean water remains at the surface and possess additional heat".

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b is the best answer for this question.