Find the Composition $f ( x ) = \sqrt { x + 9 }$

Multiple Choice

Find the composition.
-If $f ( x ) = \sqrt { x + 9 }$ and $g ( x ) = 8 x - 13$ , find $f [ g ( x ) ]$

A) $2 \sqrt { 2 x - 1 }$
B) $8 \sqrt { x - 4 }$
C) $2 \sqrt { 2 x + 1 }$
D) $8 \sqrt { x + 9 } - 13$