The correct answer is A) By centralizing the government and breaking the area into regions and then provinces.
Chandragupta Maurya achieved control over such a large empire by centralizing the government and breaking the area into regions and then provinces.
What he does was take full control of the government by centralizing the main administrative activities of the empire so he could oversee the most important aspects of the government. He divided the territory into provinces to better handle the administration of each one. He also allowed the creation of a group of counselors or ministers that formed a council to support the administration.