The correct answer is D) Most European nations are part of the European Union.
Explanation:
The European Union is an alliance or union between multiple countries of Europe, in the map included, the countries that are members are in blue, those that want to join the union or are candidates are in red, and those that do not belong to the union are in green.
In this context, and considering Europe includes around 44 nations, it can be concluded most European nations are already part of the Union because the map shows around 24 nations belong to the European Union including Italy, Greece, Spain, Finland, Sweeden, among others; and only some nations such as Norway, Bulgaria or Belarus do not belong to the Union; however, four of them are interested in joining.
