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Which of the following is true?a. Advertising on a national scale became a widely accepted practice, but only after the Civil War.b. The first attempts at advertising on more than the local level were directed at consumers rather than retailers.c. By 1920, advertising was a billion-dollar industry.d. Only a and b are correct.e. Only a and c are correct.

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Advertising on a national scale became a widely accepted practice, but only after the Civil War. b. The first attempts at advertising on more than the local ...

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