Find the Domain Of $g \circ f$ Where $f ( x ) = \frac { x } { x - 64 }$

Multiple Choice

Find the domain of $g \circ f$ where $f ( x ) = \frac { x } { x - 64 }$ and $g ( x ) = \sqrt { x }$ .

A) $( 0,64 ] \cup ( 64 , \infty )$
B) $( - \infty , 0 ] \cup ( 64 , \infty )$
C) $[ 0,8 ) \cup ( 8 , \infty )$
D) $( 0 , \infty )$
E) $( 0 , \infty )$ .