According to historians, which three of the following factors may have contributed to the downfall of the Maya empire? A. migration B. epidemic C. famine D. invasion E. revolt

Several factors contributed to the downfall of the Mayan Empire, among which are migration, which caused an overpopulation and the drought that caused a great famine in the inhabitants, and although these were not always contemporaries or were all together in a single city, they contributed to the fall of the empire.