Definition: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Try to find the best answer that is most likely to fill in "_". Note that the URLs in the text have been replaced with [Link].
Input: Adding to a raft of investigations worldwide, Paris prosecutors have launched a preliminary probe into possible fraud over the pollution-cheating software installed in diesel engines by Volkswagen. The French investigation opened following information received from an elected official in the Paris region and also from public statements about the scandal that has engulfed VW, a judicial source said today. Volkswagen has admitted 11million vehicles worldwide are equipped with the software that dupes pollution emission testing. The French probe into suspected 'aggravated' deception will only concern cars sold in France. Nearly one million diesel cars of Volkswagen brands – VW, Audi, Skoda and Seat – have been sold in France in recent years fitted with the pollution-cheating software, according to VW's French unit.Nearly one million VW brands fitted with cheat devices were sold in FranceFrench minister branded VW's deception 'a form of theft from the taxpayer' 
 Question:Alongside the Paris prosecutor's investigation, several complaints have been announced in _ by an environmental association and the French owners of Volkswagen diesel cars as well as shareholders in the VW auto group.

France