Why Was Cahokia Significant

Why was Cahokia significant?

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