Find $( g \circ f ) ( x )$ Where $f ( x ) = 4 x + 7$

Multiple Choice

Find $( g \circ f ) ( x )$ where $f ( x ) = 4 x + 7$ and $g ( x ) = x ^ { 2 } - 1$ .

A) $4 x ^ { 3 } 28 x ^ { 2 } - 4 x - 7$
B) $4 x ^ { 2 } + 3$
C) $16 x ^ { 2 } + 56 x + 48$
D) $16 x ^ { 2 } + 6$
E) $4 x ^ { 2 } + 6$