For nonzero real numbers $x$, $y$, and $z$ whose absolute values are distinct from each other,
$$\begin{aligned}| x + y | & = | x | - | y | \\| y + z | & = | y | + | z |\end{aligned}$$
the following equalities are satisfied.
Given that $x > 0$,\
I. $\frac { x } { x + y } < 1$\
II. $\frac { y } { y + z } < 1$\
III. $\frac { z } { x + z } < 1$\
Which of the following statements are always true?\
A) Only I\
B) Only II\
C) Only III\
D) I and III\
E) II and III