题目解析:
根据 important feature, ceremonial centers, lack 定位, Although they did consist of a number of large and varied buildings, they did not have a substantial resident population. 虽然它们确实由许多大型和各种各样的建筑物组成=A,但它们没有大量的常住人口=B Their permanent population consisted mainly of rulers, priests, and their attendants plus a limited number of artisans.=C 有社会阶层区分 some of the peasants would be called into the centers to help in the construction of new temples=D ,所以选 B。