Determine the Domain of the Function $f ( x ) = \frac { x ^ { 2 } - 25 } { x ^ { 2 } + x - 20 }$

Multiple Choice

Determine the domain of the function $f ( x ) = \frac { x ^ { 2 } - 25 } { x ^ { 2 } + x - 20 }$ .

A) Domain: all real numbers except x = 5 and -4
B) Domain: all real numbers except x = -5 and -4
C) Domain: all real numbers except x = -5 and 4
D) Domain: all real numbers except x = -4
E) Domain: all real numbers