19^th-century cost-saving innovations in steamboat transportation included all of the following except

Question

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The primary innovation in steamboat transportation was not the replacement of steam-powered boilers by coal-burning engines. Steamboats, by definition, were powered by steam engines, and innovations focused on improving efficiency and capacity rather than replacing the steam power source itself. Choices B, C, and D represent actual cost-saving innovations by making boats lighter, increasing cargo capacity, and extending operating hours into the night.

19th-Century Cost-Saving Innovations in Steamboat Transportation Included All of the Following

19^th-Century Cost-Saving Innovations in Steamboat Transportation Included All of the Following