Which of the following is true of the time measurement systems used by ancient mesoamerican and south american cultures?

the incas, aztecs, and mayans all had calendars.
the incas and aztecs had calendars, but the mayans did not.
the incas and mayans had calendars, but the aztecs did not.
the incas had calendars, but the mayans and aztecs did not.

The correct answer is that all of them had calendars. Besides of calculating the passage of time, the calendars in Mesoamerican cultures were very important for religious, astronomical and cultural purposes among those civilizations, such as divination and social events.

powers  are  denied  to the  national governmentin three distinct ways: some  powers, such as the  power  to levy duties on exports or prohibit the freedom of religion, speech, press, or assembly, are expressly  denied  to the  national government  in the  constitution.

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