Find the Domain of the Composite Function F $f ^ { \circ } g$

Multiple Choice

Find the domain of the composite function f $f ^ { \circ } g$
- $$f ( x ) = x + 8 ; \quad g ( x ) = \frac { 4 } { x + 6 }$$

A) $\{ x \mid x \neq - 14 \}$
B) $\{ x \mid x \neq - 6 \}$
C) $\{ x \mid x \neq - 6 , x \neq - 8 \}$
D) $\{ x \mid x$ is any real number $\}$