Chandragupta Mayura first conquered the continent ( so by conquering could be an option), but then managed to introduce long-termn changes by reforms which lead to the modernization of the subcontinent, which is the right answer.
The three powerful dynasties that developed after Alexander the Great's death were. Ptolemy dynasty, Seleucus dynasty and Antigonid dynasty. For Ptolemy dynasty, they were absorbed with the Roman Empire and because their rulers were not effective, they were under control by the Romans in Egypt. For the Seleucus dynasty, they lost control over the Asia Minor against the Roman Empire and was abolished by Pompey the Great. Antigonid dynasty lost their war against the Romans because of the three "fetters" of Greece through three wars.
Immigrants have chosen to live in the middle colonies because they are seen as a "greater opportunity"