Determine which of these relations are transitive. The variables x, y, x', y' represent integers. A. x∼yx∼y if and only if xyxy is positive. B. x∼yx∼y if and only if x+yx+y is positive. C. (x,y)∼(x′,y′)(x,y)∼(x′,y′) if and only if x−y=x′−y′x−y=x′−y′.

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