Denmark is a good example of a nation-state because...
A) Danish and German nationalities intermingle in Schleswig-Holstein
B) It is an independent country that is a member of the United Nations
C) Nearly the entire population are ethnic Danes who speak Danish
D) The people living on the Faeroe Islands, which are controlled by Denmark, speak Faeroese
E) Denmark consolidated its boundaries by giving Greenland to Norway
Denmark is a goo example of a nation-state because nearly all Danes speak Danish and live in Denmark. So in this case the correct answer would be C. Nearly the entire population are ethnic Danes who speak Danish.