Answer:
Emperor Napoleon Bonaparte
In 1801 after a series of secret agreements, French Emperor Napoleon Bonaparte (1769–1821) recovered the territory of Louisiana from Spain, which France had lost in 1763.
Explanation:
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The answer to this question is...
D.) FRANCE
The transcontinental railroad transformed the west because it made the idea of manifest destiny so much easier to achieve. The railroads also gave access to many trade spots, which in result connected them all, making the economy of America BOOM.