Which of the Following Is a Possible Explanation for the Precipitous

Which of the following is a possible explanation for the precipitous decline of Mayan civilization?

A) A massive attack resulted in the exile and enslavement of millions of Mayan people.
B) A series of plagues transmitted from animals to humans swept away large portions of the Mayan population.
C) A combination of ecological pressures, climatic shifts, and poor leadership led to the rapid deterioration of Mayan civilization.
D) A disease spread among the corn crops of the Mayan zone of rule, and the Maya were consequently denied a staple of their diet.