Find $f \circ g$ And the Domain of the Composite Function $f ( x ) = \frac { 1 } { x } , g ( x ) = x + 7$

Multiple Choice

Find $f \circ g$ and the domain of the composite function.
$f ( x ) = \frac { 1 } { x } , g ( x ) = x + 7$

A) $\frac { 1 } { x } + 7$ Domain of $f \circ g$ : all real numbers x except $x = 0$
B) $- \frac { 1 } { x + 7 }$ Domain of $f \circ g$ : all real numbers x except $x = - 7$
C) $\frac { 1 } { x + 7 }$ Domain of $f \circ g$ : all real numbers x except $x = - 7$
D) $\frac { 1 } { x } - 7$ Domain of $f \circ g$ : all real numbers x except $x = 0$
E) $\frac { 1 } { x - 7 }$ Domain of $f \circ g$ : all real numbers x except $x = 7$