Find the Domain of the Rational Function $$R ( x ) = \frac { - 3 x ^ { 2 } } { x ^ { 2 } + 4 x - 12 }$$

Multiple Choice

Find the domain of the rational function.
- $$R ( x ) = \frac { - 3 x ^ { 2 } } { x ^ { 2 } + 4 x - 12 }$$

A) $\{ x \mid x \neq 6,2 \}$
B) $\{ x \mid x \neq - 12,1 \}$
C) $\{ x \mid x \neq 6 , - 2 \}$
D) $\{ x \mid x \neq - 6,2 \}$