Earth’s surface is subjected to unusually high rates of weathering. The Moon and some of the inner planets of our solar system are also subject to surface weathering, but at much slower rates. Which of the following statements most reasonably explains Earth’s uniquely rapid weathering rates? A. Earth has an oxygen-bearing atmosphere. B. Other celestial bodies are too small for external processes to operate. C. Earth has running water at the surface. D. Earth has numerous active volcanoes. E. Earth supports a variety of plant life.