Answer:
I would say D. Town.
Explanation:
City - An inhabited place of greater size, population, or importance than a town or village.
Country - A county is a geographical region of a country used for administrative or other purposes in certain modern nations.
State - Services provided by the state state-run agency .
Town is the smallest populated area of these choices. :)
Following the rivers was a good strategy in the idea that they wouldn't need to cross the river too many times. Crossing the rivers was hazardous, and many lives were lost if the waters weren't shallow.
Additionally, it was a source of drinking water, and a gathering place for animals they could hunt for food.
Answer: They wanted people to keep a lot of silphium.