Which of the following describes Chandragupta's rule of the Mauryan Empire?

The Maurya Empire was a geographically extensive Iron Age historical power founded by Chandragupta Maurya which dominated ancient India between 322 BCE and 187 BCE. Extending into the kingdom of Magadha in the Indo-Gangetic Plain in the eastern side of the Indian subcontinent, the empire had its capital city at Pataliputra (modern Patna).[2][3] The empire was the largest to have ever existed in the Indian subcontinent, spanning over 5 million square kilometres (1.9 million square miles) at its zenith under Ashoka.