The Best Example of a Nation Among the Following Is

The best example of a nation among the following is

A) an island with a long history of self-rule and a homogeneous ethnic identity, although the island has been under the control of a colonial power for the last 30 years.
B) a group of islands inhabited by a homogeneous ethnicity, although the westernmost islands pertain to the territory of one country whereas the easternmost islands pertain to another country.
C) a mountainous region inhabited by heterogeneous ethnicities and divided up administratively among various independent countries.
D) a mountainous region inhabited by heterogeneous ethnicities which share responsibility for maintaining an independent government and a standing army.
E) a mountainous region inhabited by a mixture of peoples but recently colonized by a European nation-state.