Some positions in society that are most valuable are being a good and responsible citizen
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This would be considered a primary source since it came directly from Hillary Clinton. If it were a paraphrased version of her speech, for example, then it would be considered a secondary source.
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Answer:
Marginal analysis is helpful to individuals and businesses in balancing the costs and benefits of additional actions, like whether to produce more, consume more, and similar other decisions, thus determining whether the benefits will exceed costs and increase utility.