Question below

The correct answer should be B) both temperature and salinity gradient. Thermohaline derives from thermo- temperature and haline- salt content. So thermohaline circulations are dri...

Thermohaline circulation is affected by both temperature and salinity (as salinity is dependent on density and vice versa).

both temperature and salinity from the name you can interpret... also called density circulation because density depend on both temperature and salinity.