TOEFL Listening: TPO-TOEFL阅读TPO - OGR341M34TAXV26TN$

Which of the following best indicates the organization of paragraph 1? A. It presents the conditions that caused a change in a population's living patterns and then explains why those conditions got worse. B. It identifies certain present-day cultural traditions and rules and then traces them to their roots in the thirteenth century. C. It casts doubt on one explanation of the move to pueblos and then introduces an alternative explanation that the passage will defend. D. It describes a major change in a population's living patterns and then presents a number of problems that resulted from that change.