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OpenStudy (anonymous):
Compare the emergence of advanced civilizations in Meso and South America with the four early river valley civilizations. The calendars produced by the Mayan and ancient Mesopotamian civilizations a. were both accurate b. are still used today c. were based on the moon's cycles d. never worked correctly
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OpenStudy (anonymous):
B
OpenStudy (anonymous):
Are you sure, or is that just a rough estimate?
OpenStudy (anonymous):
No its A
OpenStudy (anonymous):
are you sure?
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