Before cities can exist, it is necessary that the civilization have:

enough farmland

large population of nonfarmers

large amount of industry

complicated road system

enough food

The correct answers are B) large population of nonfarmers an E) enough food.

Before cities can exist, it is necessary that civilization has a large population of nonfarmers and enough food.

That is how early civilizations were formed. First, they had to settle in fertile territories. For instance, that is what the Sumerian civilization did in the Middle of the Tigris and Euphrates River, in the Middle East. Then, when they learned how to grow crops, they could stay there and grow their population. They formed powerful city-states such as Ur, Lagash, Uruk, and Kish.

"germany's geographic location was an advantage when it was on the offensive in the war because it was situated next to an extremely wide river, the rhine, which was difficult for the allies to cross."