What was the benefit of using the lottery system in ancient greece?

This machine was, in essence, just like the lottery machines used in so many national lotteries in countries around the world today. It provided the Athenians with a definitive way of ensuring that the important organs of their system of democracy were not tainted by corruption. This machine, combined with the fact that most juries were 500 people strong, made bribing juries in advance a practical impossibility and helped reassure the citizens of Athens that when a decision was made, it was made on the strength of the arguments alone. The kleroterion is thus a remarkable testament to a remarkable civilization.

d) a constitutional amendment

he sent troops to protect the students as they entered the school.