A. countryside
Many reasons:
1) wrong tense for any of the other answers
2) none of the other answers provide refuge
The country which lies between Croatia and Serbia is Bosnia and Herzegovina. Bosnia and Herzegovina is in southeastern Europe and its capital is Sarajevo. It also has a border with Montenegro and has a coast next to the Adriatic Sea.
They young populations are challenging and expensive for a country to care for because they require more healthcare, immunization, and checks-up , Especially for children. Not only that, they also still haven't be able to contribute to the country's economic growth
I believe the answer for that is altitude
hope it helped
French population changed due to immigration