What was an effect of the growth of the service industry in the late 1800s? the number of people who worked in factories decreased. the number of people who worked in factories increased. the urban middle class grew. the urban middle class shrunk.

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answer: the risk-return relationship. generally, the higher the potential return of an investment, the higher the risk. there is no guarantee that you will actually get a higher return by accepting more risk. diversification enables you to reduce the risk of your portfolio without sacrificing potential returns.

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