d) the establishment of a bureaucracy to manage civil affairs
Explanation:
Chandragupta Mauryan founded the Maurya empire in ancient india, he was one of the most succesfull rulers and leaders that India ever saw, this was because he created a bureaucracy that managed civil affairs, helping him to keep the population of his empire happy, he created infrastructure for the empire that made the life of its habitants easier.
It Involved this stablishment of a high quality schools . Missionaries were responsible for English pioneering and vernacular education. GOD Bless Have a nice day!
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