TOEFL Reading: ETS-TOEFL阅读机经 - 09YUYW63UF1W8F7DL$

According to paragraphs 3 and 4, which of the following best describes how archaeologists arrived at their current view of the nature of Chaco during the Bonito phase? A. They discovered a large number of kivas, which probably served as temporary houses for pilgrims on their way to the main temple. B. They found a series of paths leading to the outliers, which seem to have been centers of trade for makers of jewelry and other products. C. They found turquoise beads and pendants and other valuable objects, leading to the theory that the great houses were wealthy residences. D. They discovered many objects and rooms associated with ritual activity, leading to the theory that Chaco was a religious center.