The correct answer is;
C.tensions between different ethnic groups
Step-by-step explanation:
Yugoslavia contained a staggeringly diverse collection of ethnicities for instance Albanians, Bosnian Muslims, Macedonians, Croats, Hungarians, Montenegrin, Serbs, and Slovenes. Some groups were comparatively related to communist regime after the Germany occupation in Second World War. Therefore Yugoslavia ethnic conflict led it towards it collapse.