TOEFL Reading: ETS-TOEFL阅读机经 - P87_9J6NT1Q_D309L$

According to paragraph 2, what is true of the creosote bush of United States deserts? A. It tends to grow small branches during dry parts of the year. B. It loses more water through its bark than through its leaves. C. It loses its lower branches only after losing upper ones. D. It sheds branches for the purpose of propagating itself.