The range of 9 consecutive positive integers is r. The standard deviation is d, and the average value is m. Which of the following options correctly determines the relationship among r, d, and m?
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A$$\frac{m-r}{2}$$ > d
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B8d < r
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Cm+4d < the largest number in the number sequence
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Dm-4d > the minimum number in the number sequence
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Ed < r
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正确答案: E