Answer:
Congress
Explanation:
New States may be admitted by the Congress into this Union; but no new State shall be formed or erected within the Jurisdiction of any other State; nor any State be formed by the Junction of two or more States, or Parts of States,
Pope Leo III<span>. </span>Pope<span> Saint </span>Leo III<span> (Latin: </span>Leo; fl. 12 June 816) was Pope<span> from 26 December 795 to his death in 816. Protected by </span>Charlemagne<span> from his enemies in Rome, he subsequently strengthened </span>Charlemagne's<span> position by crowning him Holy Roman Emperor and "Augustus of the Romans".</span>
This is of course a very complex question that does not have a definitive answer, but 1850s would be a good decade to start counting as "Modern". This was a decade of the telegraph and Darwin's The Origin of Species.
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I believe best choice would be “saving to easily access the money when needed”.