The correct answer is C. Increased population growth. This enabled the people to have many workers in their factories and it also enabled the England to have a large army that would go and colonize and take the resources back to England. The other things weren't that helpful.
Try googling it bc i cant even find it
The greeks are surrounded by sea, making it easier for them to built fort-based city. This type of city organization of course couldn't be done by the persians that's surrounded by desert. Hope This Helps!