Determine which of these relations are transitive. The variables x, y, x', y represent integers A. x~y if and only if x +y is positive. B. (x, y)~(x/.y/) if and only if x+yx+y C. x~y if and only if xy 2 0 D. x~y if and only if x + y is even. Ex~y if and only if xy is negative. Fx~y if and only if x-y is a multiple of 10.