The Mayan calendar is complex and incorporates three different cycles based on the coordinated movements of the sun, moon, and

The correct answer is A. Venus.

The Mayan calendar incorporates three distinct cycles: the Tzolk’in (a 260-day ritual calendar), the Haab’ (a 365-day solar calendar), and the Long Count (which tracks longer time periods). The movements of Venus were particularly important to the Maya, as they associated its cycles with significant events, including warfare and agricultural activity. This close observation and calculation based on astronomical bodies reflect the sophistication of their timekeeping systems.