|x-z|>|x-y|?
Is |x-z|>|x-y|?
1). |z|>|y|
2). 0>x

[spoiler]St I and II are Insuff alone,

using I and II , I draw the number line and the combinations below satisfy.
IMO C

...z.............y...x........0............
.............x......0.......y..........z
...........z..........x......0..y.....[/spoiler]