Austria-Hungary's invasion of Serbia led to the start of World War I. The correct option among all the options given in the question is the third option. The assassination of Franz Ferdinand, who was also the Archduke of Austria-Hungary by Gavrilo Princip acted as the catalyst for the starting of the World war I. Gavrilo Princip was a Serbian national.
Answer:
The main reasons responsible for war include economic gain, territorial gain, religion, nationalism, revenge, and more factors.
Answer:
US immigrants created significant numbers of enclaves because of the hostility they faced (not the other way around). In the 1800s, unemployment levels weren't a significant concern relevant to this issue, and overpopulation worries weren't fully realized as a contemporaneous issue.
The answer to your question is positive
