Find the Requested Composition of Functions $f ( x ) = \frac { x - 7 } { 10 }$

Multiple Choice

Find the requested composition of functions.
-Given $f ( x ) = \frac { x - 7 } { 10 }$ and $g ( x ) = 10 x + 7$ , find $( g \circ f ) ( x )$

A) $x + 14$
B) $x$
C) $x - \frac { 7 } { 10 }$
D) $10 x + 63$