What constituted the center of culture of the Cahokia people—or the

What constituted the center of culture of the Cahokia people—or the Mound Builders—of the Mississippi Valley?

A) cliff dwellings that offered protection from enemies, since they could be reached only by ladders
B) scattered pueblos and villages that the first Spanish explorers encountered in the 1500s
C) a city surrounded by strong wooden walls with thatch-covered houses that were home to 20,000 to 40,000 people
D) a hunting and gathering economy that supported small, somewhat unsettled communities

ANSWER
Answer: C