Man-made pollution also harms sea otters. Toxins used in human industries are often released into the ocean. This water run-off can carry disease-causing parasites. These parasites can kill sea otters. Scientists have reported extremely high levels of man-made chemicals in the sea otters they study. They estimate that up to 40 percent of sea otter deaths are caused by water pollution.What point does the author make in the passage?

A. Human industries are financially successful because they use a lot of toxic
chemicals.
B. Industries dispose of their waste in large bodies of water.
C. Sea otters are being tested by scientists all over the world.
D. Water pollution from human industries is increasing the number of sea otter deaths.