The correct answer is - B. Finland.
The North European country of Finland, nowadays well known for the mobile phones Nokia, is a country that has a very long and very turbulent history. The now independent prosperous country was not always like that, and until 1809 it was under the rule of the Swedish monarchy.
The territory of Finland has been a battle field for centuries between the Germanic people from Scandinavia, and the Slavic people from what is now Russia, and they have had multiple turns in ruling over the Finnish people. Because of this, the Finnish people, over time, lost big portion of their ethnic territory, the majority of it being incorporated by Russia, while the rest by Sweden and Norway.