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OpenStudy (anonymous):
In what order were these breakthroughs invented? A. Airplane, radio, telegraph B. Steel, automobile, airplane C. Iron, airplane, automobile D. Iron, airplane, telephone
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OpenStudy (therealmeeeee):
The correct order of inventions is Steel, automobile, airplane. Steel and iron came first, after which the automobile made its debut, before the airplane made its first appearance in 1903. Iron started the industrial revolution
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