​Find $g \circ f$ ​ $f ( x ) = x ^ { 2 } , g ( x ) = x - 4$

Multiple Choice

​Find $g \circ f$ .​ $f ( x ) = x ^ { 2 } , g ( x ) = x - 4$ ​ ​

A) $x ^ { 2 } - 4$
B) $x ^ { 2 }$
C) $( x - 4 ) ^ { 2 }$
D) $\left( x ^ { 2 } + 4 \right)$
E) $( x + 4 ) ^ { 2 }$