These groups hoped to drive Austria-Hungary from the Balkans and establish a 'Greater Serbia', a unified state for all Slavic people. It was this pan-Slavicnationalism<span> that inspired the assassination of Archduke Franz Ferdinand in Sarajevo in June 1914, an event that led directly to the outbreak of </span>World War<span> I. </span>1<span>.</span>
They could make more trips
The answer is D. economic problems in one nation spread to other nations.