Determine the Domain Of $f ( x ) = \frac { x ^ { 2 } + 9 x + 20 } { x ^ { 3 } + 5 x ^ { 2 } - x - 5 }$

Multiple Choice

Determine the domain of
$f ( x ) = \frac { x ^ { 2 } + 9 x + 20 } { x ^ { 3 } + 5 x ^ { 2 } - x - 5 }$

A) all real numbers except $x = - 1 , x = 1 , x = - 5$ , and $x = - 4$
B) all real numbers except $x = - 1 , x = 1$ , and $x = - 5$
C) all real numbers except $x = - 5$ and $x = - 4$
D) all real numbers except $x = 5$
E) all real numbers