Answer: The two fields of study were astronomy and mathematics. The correct answer is A.
Explanation:
It was the Maya people who invented the and are credited with making the most advanced and accurate calendar. The used mathematics and astronomy to make the calendar without any type of technology. The made the calendar for religious purposes and also for agriculture such as farming. They would plant their crops based on the knowledge that was learned from astronomy. They used mathematics and symbols they created for trade transactions with each other and other tribes.
