State the Domain of the Rational Function $$f ( x ) = \frac { x - 9 } { x ^ { 2 } + 4 }$$

Multiple Choice

State the domain of the rational function.
- $$f ( x ) = \frac { x - 9 } { x ^ { 2 } + 4 }$$

A) $( - \infty , - 3 ) \cup ( - 3,3 ) \cup ( 3 , \infty )$
B) $( - \infty , - 4 ) \cup ( - 4 , \infty )$
C) $( - \infty , 4 ) \cup ( 4 , \infty )$
D) $( - \infty , \infty )$