"Hellenistic" is the age to which Alexander the Great owe the majority of the ideas.
The important skill that gave Africa's Bantu speaking people an advantage would be "ironworking" This allowed them to successfully create things the Nomadic hunters couldn't.
I would actually say D.
With the industrial revolution, the amount of crops being produced actually wasn’t having too much work being put into producing those said crops. So it would actually encourage more people to become farmers because less work for more money is definitely something that most people would want to go for.
I hope this helps, have a great rest of your day!