Why Was Cahokia Significant

Why was Cahokia significant?

A) Cahokia was the center of Mayan culture.
B) Cahokia was a large metropolis on the Mississippi River that built its economy on river-borne trade.
C) Cahokia was the largest city in the Maya empire and contains pyramids similar to those found in Egypt.
D) Cahokia was a mythical city where many Indians believed life in North America began.
E) Cahokia was a large city located in present-day Mexico that served as the main trading center for the entire area.