What were the most important reasons why world war 1 began? check all that apply.

I don't see the things i am supposed to check, but i will still answer your question. The most important reasons why WW1 started was because of Militarism, Alliances, Imperialism, and Nationalism.

you will need these

an outline of all three paragraphsan identification of the historical era that you are writing aboutan explanation of the term mass productiona description of two ways new technology affected industrya conclusion that shows how new technologies allowed industrialization to grow

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