TOEFL Reading: ETS-TOEFL阅读机经 - YC16Z251690Z6TIBL$

Which of the following best describes how paragraph 1 is organized? A. Two simultaneous developments are described, as well as the reasons why neither one would have occurred without the other. B. A hypothesis is presented, and then points in favor of that hypothesis as well as points against it are discussed. C. A major event is described, and then the most obvious effects of that event are presented. D. A decision is described, and then one likely motivation for that decision is presented.