Perform the Indicated Operation and Simplify If Possible $\frac { 18 } { x ^ { 2 } - 1 } + \frac { 9 } { x + 1 }$

Multiple Choice

Perform the indicated operation and simplify if possible.
- $\frac { 18 } { x ^ { 2 } - 1 } + \frac { 9 } { x + 1 }$

A) $\frac { 9 } { x + 1 }$
B) $\frac { 9 } { x - 1 }$
C) $\frac { 9 } { x ^ { 2 } - 1 }$
D) $\frac { 9 ( x + 3 ) } { x ^ { 2 } - 1 }$