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OpenStudy (anonymous):

Which was a cause of World War I? the Second Industrial Revolution Europe's system of military alliances Russia's race to industrialize the invention of the airplane

OpenStudy (anonymous):

hold on

OpenStudy (anonymous):

the second industrial revolution

OpenStudy (ondinana):

Europe's system of military alliances.

OpenStudy (anonymous):

so which one is it?

OpenStudy (ondinana):

My choice, I took this exact test and just got my answer key. XD

OpenStudy (anonymous):

yeah they are right i read it wrong

OpenStudy (anonymous):

ah okay, thxs

OpenStudy (ondinana):

Anytime. ^_^

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