The correct answer is - A. The Hague, Netherlands.
The Balkan Wars after the fall of Yugoslavia were devastating for the people and the countries once part of this strong unified nation. After the nationalistic parties managed to gain control in their countries, they started to fight with their ''old enemies'' for gaining more territory, creating ethnically clean areas, and committing genocides in as well.
Most of the crimes were done against the Muslim Bosnians, Serbians, Croatians, Albanians, but also the Serbians, Croatians, and Albanians were the ones that were making genocide, so they were all intermingled, and the ordinary people suffered the most.
Most of the war criminals were having trials in Hague, Netherlands, with the Serbians and Croatians dominating, but interestingly enough, there were no charges against Albanian war criminals from Kosovo that also were making genocide on innocent population.