Find the Least Common Denominator of the Rational Expressions $\frac { 4 } { x ^ { 2 } + 7 x + 6 }$

Multiple Choice

Find the least common denominator of the rational expressions.
- $\frac { 4 } { x ^ { 2 } + 7 x + 6 }$ and $\frac { 6 } { - 3 x - 18 }$

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