The true statements about railroad expansion in the late 19th century are:
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It led to new managerial forms and techniques. - The growth of railroads required more sophisticated management techniques and organizational structures, leading to innovations in management practices.
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It accelerated the growth of new territories. - Railroads facilitated the settlement of new areas, promoted trade, and made it easier for people to move to and develop new territories.
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It was not paid for by the government. - While the government did contribute to railroad expansion through land grants and subsidies, much of the funding came from private investment and railroad companies themselves.
The statement "it grew too quickly and large corporations lost money" is somewhat misleading. While some railroads did face financial difficulties, the overall expansion of the railroad industry was a significant driver of economic growth during this period, with many companies thriving despite some failures.
Thus, the first three statements are true.