The Mauryan Empire grew as a result of

The Maurya Empire was founded in 322 BCE by Chandragupta Maurya, who had overthrown the Nanda Dynasty and rapidly expanded his power westward across central and western India in order to take advantage of the disruptions of local powers in the wake of the withdrawal by Alexander the Great 's armies.

answer; i believe that the correct answer is (chronological order);

the indians crossed artificial boundaries, setting the stage for conflict