The mayans’ was/were very advanced for their time.
a. astronomy
d. a and c
b. educational system
e. all of the above
c. mathematics

d). A and C

Explanation:

The Mayans' astronomy and mathematics were very advanced for their time.

The Maya Civilization  flourished in Central America in a region that is today made up of southern Mexico. It began as early as 2000 BC. The Mayan civilization is the most advanced and dominant civilizations that developed in the Americas the Europeans arrived. They were the only American civilization among the other Aztecs civilization and Inca civilization to develop an advanced written language. They are also advance in architects, arts, mathematics and astronomy.

Thus Mayan Civilization is most advance din mathematics and astronomy.

~kinetic ~potential

explanation:

kinetic and potential energies would be types of mechanical energies.

in about winter like late november to january