How does China's geography contribute to the environmental hazard shown?

A.
Rivers carry toxins from factories downstream to populated areas throughout the country.

B.
Wind carries air pollution to dense urban centers and smog settles in heavily populated lowlands.

C.
Plate tectonic activity undermines stability in industrial areas, making them vulnerable to leaks.

D.
Runoff from farms and plants causes ground pollution that contributes to acid rain in regions with heavy precipitation.