4th option is the correct answer
Answer:
1. Mutual Defense Alliances
2. Imperialism
3. Militarism
4. Nationalism
5. Immediate Cause: Assassination of
Archduke Franz Ferdinand
Explanation:
The assassination of Austrian Archduke Franz Ferdinand (June 28, 1914) was the main catalyst for the start of
the Great War (World War I). After the assassination, the following series of events took place:
July 28 - Austria declared war on Serbia.
August 1 – As Austria’s ally, Germany declares war on Russia, an ally of Serbia
August 3 – Germany declares war on France, an ally of Russia and immediately begins an invasion of
neutral Belgium
August 4 – Great Britain, an ally of France, declares war against Germany
The United States (President Wilson) declares that the United States will remain neutral
