C. Nobody knows
Explanation:
"One by one, the Classic cities in the southern lowlands were abandoned, and by A.D. 900, Maya civilization in that region had collapsed. The reason for this mysterious decline is unknown, though scholars have developed several competing theories." History channel
Hope this helps! :D
According to the video, nobody knows the reason for the fall of the Mayan empire.
The Maya people are a group of indigenous people of Mesoamerica. The Maya people formed the ancient Maya civilization. Today, the Maya people can be mainly found in Southern Mexico.
The main reason for the fall of the Mayan empire wasn't known. Some of the reasons that were suggested included drought, overpopulation, warfare, environmental degradation, disease, etc. Therefore, nobody really knows the cause of the fall of the empire.
Read related link on:
https://brainly.com/question/15971507
