What are three things the mauryan empire haff that made them a great civilization

Three things the Mauryan empire haff that made them a great civilization:

Mauryan Empire is the world’s largest empire in the Indian subcontinent.  Civil services during the period of Mauryas were unfathomable.  Single currency enabled local and international trade possible. It had a huge army and cavalry which were the greatest strength and a cause of threat to the enemies of Mauryas. Espionage network were perfect and on time services were rendered by the ambassadors in the communication of messages between the empires.  

Ashoka was also a famous Mauryan empire who relinquished his kingdom and followed the path of Buddhism. He was also involved in building extensive public utility buildings and introduced many schemes which were for the upliftment of the people.  

i only have part a but here is the first one: - lewis and clark are born

- lewis marries sacajawea and clark is jealous  

- clark drowns lewis and then goes to jail