Which of these are opposites of each other
2/3, 3/2
2/3,-2/3
-2/3, 3/2
2/3, -3/2

B And C so 2/3,-2/3 and -2/3,3/2

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.