What was the significance of a 52 year cycle in both the aztec and the mayan calendars?
a. that was the average lifespan of a mayan or aztec individual.
b. the ritual and agricultural cycles finished together every 52 years.
c. mesoamericans used a base-13 instead of base-10 number system.
d. a mesoamerican myth said that the sun was reborn every 52 years.