Find the LCD of the Rational Expressions in the List $$\frac { 4 } { 3 x + 9 } , \frac { 6 x } { 4 x - 12 }$$

Multiple Choice

Find the LCD of the rational expressions in the list.
- $$\frac { 4 } { 3 x + 9 } , \frac { 6 x } { 4 x - 12 }$$

A) $( x + 3 ) ( x - 3 )$
B) $( x - 3 ) ^ { 2 }$
C) $12 ( x - 3 ) ^ { 2 }$
D) $12 ( x + 3 ) ( x - 3 )$