单项选择题
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A. if Quantity A is greater; B. if Quantity B is greater; C. if the two quantities are equal; D. if you cannot determine the relationship based on the given information.
单项选择题 The median salary for professional group A is $40,610. The median salary for professsional group Bis $40,810. The median salary for groups A and $ 40,710 B combined（）
单项选择题 a and b are positive integers（）
单项选择题 （）
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