Most currents at the bottoms of lakes are density currents. Which human activity will have the greatest negative impact on density currents in a lake? A. planting trees near the shore of a lake planting trees near the shore of a lake B. creating man-made beaches near the shore of a lake creating man-made beaches near the shore of a lake industrial discharge of large amounts of heated water into a lake C. industrial discharge of large amounts of heated water into a lake D. people fishing in a lake​