$$\begin{aligned} & x = \frac { a - b } { a + b } \\ & y = \frac { b - c } { b + c } \end{aligned}$$
Given that, which of the following is the equivalent of the expression $\frac { 1 + y } { 1 - x }$ in terms of $a , b$ and $c$?\\
A) $\frac { b - c } { a - b }$\\
B) $\frac { b + c } { a - b }$\\
C) $\frac { a - b } { a + c }$\\
D) $\frac { a - c } { b - c }$\\
E) $\frac { a + b } { b + c }$