Cold water rises from the bottom of the ocean to the surface of the ocean at different places around the globe. what is this process called?

In fact, upwellings are common in areas where winds blow water away from the surface. In coastal areas, sometimes winds (called longshore winds) blow perpendicular to the land over the ocean, pushing the warm water away from the coast. This allows the cold water at the bottom to rise up and replace the warmer water.

the answer is b & c i believe : )