These have all been suggested by experts as possible reasons for the decline of the Mayan civilization. It is possible that the Mayan cities were abandoned following a natural disaster that took place around the 10th century. However, it is unclear what this could have been. Another possibility is that of drought. This would have hit the Mayans particularly hard, as they depended on rainwater for all their needs. Finally, its is possible that alliances between cities broke down, and that priests and rulers lost their power. This would have left the cities with no government.
I think it is B because there’s a bunch of human waste in the sewage system and people were drinking it cause it mix in water so people are getting sick
