Which two sentences from the article BEST support central ideas?1. Problems began as a result of the Franco-Prussian War (1870 to 1871).2. France, England and Russia had their own alliance, so this meant that any conflict in Europecould lead to war.3. Austro-Hungarian Archduke Franz Ferdinand was a great friend of Kaiser Wilhelm ofGermany.4. Austria-Hungary wanted to show the Balkan countries it was strong and would respond tothis terrible crime.