Find the Domain of the Rational Expression $f ( x ) = \frac { x ^ { 2 } - 49 } { x ^ { 2 } - 11 x + 30 }$

Multiple Choice

Find the domain of the rational expression.
- $f ( x ) = \frac { x ^ { 2 } - 49 } { x ^ { 2 } - 11 x + 30 }$

A) $\{ x \mid x$ is a real number and $x \neq 6 , x \neq 5 \}$
B) $\{ x \mid x$ is a real number and $x \neq 0 \}$
C) $\{ x \mid x$ is a real number and $x \neq 7 , x \neq - 7 \}$
D) $\{ x \mid x$ is a real number and $x \neq - 6 , x \neq - 5 \}$