For nonzero real numbers $x$ and $y$, given that $y < x$ and $x ^ { 2 } < y ^ { 2 }$,\
I. $x \cdot y > 0$\
II. $x + y < 0$\
III. $\frac { 1 } { x } - \frac { 1 } { y } > 0$\
Which of the following statements are always true?\
A) Only I\
B) Only II\
C) I and II\
D) I and III\
E) II and III