Question

Instructions:Select all the correct answers.

In what three ways did the Chinese develop the perpetual calendar wan-nien-li?

1.They observed the sun's longitude and the moon's phases.
2.They used measurements from a sundial and a water clock.
3.They determined the dates of the two solstices in a year.
4.They mapped the constellations in the night sky.
5.They surveyed citizens about how many days there should be in a year.

Answer 1

sun's longitude and moon phases

Sundial and water clock

Two Solstices in a year

Step-by-step explanation:

100%

Answer 2

it shoule be 2 as i have asnswerd thid befote and it was right