TOEFL Reading: ETS-TOEFL阅读机经 - 8186FD8RRKQCH589L$

All of the following are true of the planetesimals mentioned in paragraph 1 EXCEPT: A. They were formed of rocky material spinning around the early Sun. B. They collided violently with each other. C. They gradually grew in size. D. They lost their atmospheres as they were hit by larger bodies.