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<span> In the last quarter of the 19th century, all four items were sources of energy. Kerosene was commonly used for lighting, electricity was beginning to replace gas lighting and steam was used to power boats, trains, and certain kinds of industrial machinery. Gasoline was the primary fuel of the automobile, or "horseless carriage," which appeared in the 1890's. Of these four, however, steam was introduce the earliest. The concept of the steam engine goes back to ancient times. However, the steam engine was really introduced as a common source of energy early in the 18th Century. So while kerosene, gasoline, and electricity as an energy source were all developments of the 19th century, Steam power is at least a century (and maybe more) older. </span>
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The highest civic virtue in Rome was to put the well-being of the state and the republic above your own. The founding fathers believed that the US would prosper if people behaved in the same manner and fought together for a higher cause.
Ans-is C)
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