Despite the Evidence of Escalating Warfare, Excessive Population Growth, Drought

Despite the evidence of escalating warfare, excessive population growth, drought, and the failings of the ruling elite, the overwhelming evidence about the Mayan empire suggests that

A) Mayans were fully assimilated into the Spanish empire at the time of the conquest
B) Mayans were completely decimated by diseases brought in by the conquering Spanish
C) the Mayan empire fell prey to serious environmental problems not of their making
D) Mayans did not disappear, they simply changed their social system