51. Which current would you encounter on a direct passage from southern Africa to Argentina, South America?

The correct answer is South Atlantic. A direct passage from southern Africa to Argentina traverses the west-flowing South Atlantic Current, a mid-latitude current within the South Atlantic subtropical gyre. The Guinea Current flows eastward in the Gulf of Guinea, the Agulhas Current flows along the southeast African coast, and the South Equatorial Current is near the equator and flows toward Brazil; therefore, these options are incorrect.