So I see at least three answers here that could potentially be correct, however I believe the best possible answer would be D. they distribute heat around the planet and are a major factor influencing the climate around the globe.
(The other two possibly correct answers would be A. and B. Animals such as Sea turtles will use the ocean currents as a means of quicker transportation and navigation. Sailors would also use the currents as a means of quicker transportation and navigation, however that is not required today with modern technological advances.)<span />
This is true for the most part.
Among the northern Andean countries strongly involved in the illegal coca and drug trade, Columbia is now the predominant coca producer, so the answer would be option A.
Hope this helps!