Find the Specified Domain $\left( \frac { f } { g } \right) ( x )$

Multiple Choice

Find the specified domain.
-Find the domain of $\left( \frac { f } { g } \right) ( x )$ when $f ( x ) = \frac { 5 } { x - 3 }$ and $g ( x ) = 7 - x$

A) $( - \infty , 7 ) \cup ( 7 , \infty )$
B) $( - \infty , 3 ) \cup ( 3 , \infty )$
C) $( - \infty , - 7 ) \cup ( - 7 , - 3 ) \cup ( - 3 , \infty )$
D) $( - \infty , 3 ) \cup ( 3,7 ) \cup ( 7 , \infty )$