The quotes that best reflects the eras of Sectionalism is "For the benefit of the whole country, we need to focus on our nation’s interests instead of what is best for our region.”
The era was known for an exaggerated devotion to the interests of a region over those of a country as a whole.
The statement "For the benefit of the whole country, we need to focus on our nation’s interests instead of what is best for our region.” is correct.
Therefore, the Option D is correct.
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