TOEFL Listening: TPO-TOEFL阅读TPO - 854JW85JQ88XQV5MN$

According to paragraph 1, before the thirteenth century the people of southwestern North America lived in households that A. shared daily chores with neighboring households B. occupied dwellings that were built into the sides of cliffs C. were largely free to conduct their lives as they pleased D. enforced common standards of behavior and cooperative conduct within their communities