An oligarchy is a government in which the ruling power belongs to only a few people.
Of course, the major effect of the Louisiana Purchase was that it made the United States much bigger than it had been before. The Purchase doubled the land area of the country. This helped to make Americans feel like their country was strong and important, contributing to a sense of nationalism.
<span>http://teachingresources.atlas.illinois.edu/chinatrade/introduction04.html</span>
The answer should be C, One third. From 1820 to 2010, close to <span>76,000,000 immigrants came to the U.S.
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