Answer:
The machine gun, had been so refined that they changed the nature of warfare. Tanks and airplanes had a big impact on mechanized warfare, or warfare that relies on machines powered by gasoline and diesel engines.
Explanation:
Archduke Franz Ferdinand, Archduke of Austria-Este's assassination triggered WWI
C) The us did not want anything to do with Europes problems<span />
<span> A. China lost the Sino-Japanese
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