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It instilled national confidence. The transcontinental railroad had a major effect on how Americans perceived their nation, and it became a symbol of America's growing industrial power and a source of confidence that led them to take on even more ambitious quests.

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AngelVixbes

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Explanation: It made commerce possible on a vast scale. By 1880, the transcontinental railroad was transporting $50 million worth of freight each year. In addition to transporting western food crops and raw materials to East Coast markets and manufactured goods from East Coast cities to the West Coast, the railroad also facilitated international trade.