Choose all the items that accurately describe a difference between the Mayan calendar and the Gregorian Calendar. 1. The calendars are different in length of days.
2. The calendars were adopted in different countries in different years.
3. The Mayan calendar has three separate calendars and the Gregorian has one.
4. The Mayan calendar has three separate calendars and the Gregorian has one.
5. Both calendars are cyclical.

it provided for selection of government employees through competitive examinations. it also made it unlawful to fire or demote covered employees for political reasons or to require them to give political service or payment, and it set up a civil service commission to enforce the law.

explanation:

food chain i would say only because there is competition on getting food and survival

adopted the practice of proskynesis, a persian court custom that involved bowing down and kissing the hand of others, depending on their rank.

c. extended rights of citizenship to new groups