The right option is; B. prevailing winds and the Coriolis effect
Upwelling is a process in which strong, usually seasonal, winds push water away from the coast, bringing cold, nutrient-rich deep waters up to the surface. Upwelling takes place along coastlines and in the open ocean. Prevailing winds, Coriolis effect and Ekman transport are the main factors that cause upwelling. These factors have the same general effects but they operate in different ways for different types of upwelling.
