Quite simple, anything to do with thermohaline has to do with salt, so take that, anything to do with <u>thermo</u> has to do with temperature and finally if seawater is in the same question with circulation, one of your answer choices are bound to relate to density, so you answer is all of them, D.
thermohaline circulation is coined from two terms thermo meaning heat haline means salt content which is defined as the movement of ocean current
due to the regional differences in temperature and salinity.the reason for choosing option D which is all of the above is because temperature and salt content influences thermohaline circulation which in turn influences the density of the sea water.
