The answer is 'Railroads'
The Industrial Revolution in England lead to the development of trains and fast travel.
The United States quickly adopted the technology and brought in English businessmen and engineers to develop railroads in it's sprawling western states.
Railroads were integral in the early years in to cement newly acquired states under the control of the Federal government.
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<span>"C. The abbess sees an apparition of the Virgin Mary" is the "miracle" in Bede's "Caedmon's Hymn" but it could be considered two...
Hope That Helped =D</span>
B. geographical boundaries created in earlier historical periods
He believed in the importance of state sovereignty.