Which one of the following pairs of countries joined the European Union in January, 2007?
A
Bulgaria and Romania
B
Bulgaria and Belgium
C
Romania and Slovenia
D
Hungary and Croatia
Correct Answer: Option A
Explanation
1. The European Union (EU) underwent several enlargements.
2. In January 2007, Bulgaria and Romania joined the European Union, marking the fifth enlargement wave.
3. The other pairs mentioned include countries that joined earlier (Belgium, Slovenia, Hungary, Croatia - joined later in 2013) or are incorrect combinations.