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Immigration was the major factor
In this election, there were 20 votes uncounted when, rutherford B Hayes was outpolled by Samuel J tilden.
184 (Samuel). 165 (hayes)
The graph would represent that system would look like this (see the attachment):
Answer: The Spanish, along with other European nations, had a great desire for Chinese goods such as silk and porcelain. The Europeans did not have any goods or commodities which China desired, so they traded silver to make up for their trade deficit