Find the Domain Of $g \circ f$ Where $f ( x ) = \sqrt { x - 2 }$

Multiple Choice

Find the domain of $g \circ f$ where $f ( x ) = \sqrt { x - 2 }$ and $g ( x ) = x + 6$ .

A) $[ 2 , \infty )$
B) $[ 4 , \infty )$
C) $[ - 4 , \infty )$
D) $[ - 6 , \infty )$
E) $[ 0 , \infty )$