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.
A.The x-intercept of line k is twice the y-intercept of line k. B.The product of the x-intercept and the y-intercept of line k is positive. C.Line k passes through the points (a, b) and (r, s), where (a - r)(b - s) < 0.