Answer:
I believe it is C, please correct me if it is incorrect.
Explanation:
Some parts of the route will be mountains, rocky roads, etc. Therefore it will gradually increase.
River valley trade made them key economic areas.
Hope this helped. :)
9000/10=900 people per square mile
The area of the Balkan countries is frequently plagued by ethnic conflict that generates tension among the nations. This tension has given away to several small conflicts and the trend continued. The location of the Balkans is strategically very important. I hope the answer helps you.
