Which site contains the largest pre-Columbian settlement north of Mexico?

Here is the question :

WHICH SITE CONTAINS THE LARGEST PRE-COLUMBIAN SETTLEMENT NORTH OF MEXICO?

Here is the option for the question :

• Cahokia Mounds, Illinois
• Carlsbad Caverns, New Mexico
• Chaco Culture Park, New Mexico
• Grand Canyon, Arizona

The Answer:

And, the answer for the the question is :

Explanation:

[STC009472]. Near what is now St. Louis was the pre-Columbian city of Cahokia, which was the largest civilization found north of Mexico at the time. The city had a population fall around the year 1400 and was eventually deserted for reasons that are still a mystery. At its height, the city housed as many as 20,000 people between the years 1050 and 1150. There were over 120 earthen mounds that were left behind, the highest of which was Monks Mound, which stood nearly 100 feet tall and was the largest prehistoric earthwork structure in the Americas.