Find the Least Common Denominator of the Rational Expressions $\frac { x + 5 } { x ^ { 2 } - 5 x - 6 }$

Multiple Choice

Find the least common denominator of the rational expressions.
- $\frac { x + 5 } { x ^ { 2 } - 5 x - 6 }$ and $\frac { x + 9 } { x ^ { 2 } - 9 x + 18 }$

A) $( x + 1 ) ( x - 6 )$
B) $( x - 6 ) ( x - 3 )$
C) $( x - 1 ) ( x + 6 ) ( x - 3 )$
D) $( x + 1 ) ( x - 6 ) ( x - 3 )$