Hurry i need help who has to go on edge instead of school

What was the purpose of the Yasa in the Mongol Empire?

It was a policy that rewarded Genghis Khan’s loyal followers with wealth.

It was the Mongol religious text Genghis Khan’s army spread as it conquered.

It was a system of laws that kept order and governed people’s behavior.

It was the oath of allegiance that conquered groups swore to Genghis Khan.