TOEFL Reading: ETS-TOEFL阅读机经 - HYJID0JTL771WO3DL$

According to paragraph 3, Earth's surface is different from the surfaces of many other planetary bodies in which of the following ways? A. It is more strongly marked by river valleys and erosion. B. It is more geologically active. C. It is covered by impact craters. D. It has an atmosphere.