Respuesta :
Answer: C) Austrian-Serbian hostilities
Explanation: Austrian-Serbian hostility, as it is known, resulted in an event that was directly trigger for the WWI - assassination in Sarajevo on June 28, 1914. However, this hostility began approximately after the Berlin Congress in 1878, when Serbia was recognized by the West as an independent state, which marked the onset of the decline of the Ottoman Empire. At the time, the Pan Slovenian movement was a current, as the tendency of the Slovenian ethnic groups for independence. It is known that many Slovenian ethnic groups lived in Austria Hungary. Serbia, which after two national uprisings against the Turks at the beginning of the 19th century, became a kind of model for other Slavs in the struggle for independence. The decline of the Ottoman Empire was an exceptional opportunity for it, at least for Slovenes in the Balkans, although the idea of national freedom was all over Europe. On the other hand, Austria in the fall of the Ottoman Empire saw the opportunity to expand its influence on Balkans, since in the past these two great Empires fought for dominance in the Balkans.
There were various political turmoil here, and the key thing that severely angered the Serbs was the annexation of Bosnia in 1908. The Slavs in Bosnia, primarily the Serbs, wanted to under Ottoman decline and their withdrawal from the Balkans, Bosnia to be subjugated under Serbia, at least temporarily, historically speaking. Peoples of Bosnia are Slavs, regardless of the different religions, and Serbia with Montenegro at that time had statehood, and as such it could have been a legal entity for the protection of Bosnia. This led to the rebellion of the young Turks, which Austria used to execute the aforementioned annexation of Bosnia in 1908, under the cause of calming the situation.
It only intensified the intolerance of Serbs towards Austria, many secret societies were formed, among them "Black Hand" in Serbia, which financed and helped the "Young Bosnia" movement from whose ranks was Gavrilo Princip, an assassin to Archduke Ferdinand.