The correct answer is: the country's first democratic parliamentary elections.
The Tunisian Revolution, also called Jasmine Revolution, was a group of protests in North Africa which resulted in regime changes. The countries involved were Tunisia, Egypt and Libya.
The Arab Spring began in December 2010 in Tunisia. The streets protests prompted the authoritarian president Zine El Abidine Ben Ali to abdicate and flee to Saudi Arabia.
The first free elections for over twenty years were held in October 2011.