Find the Requested Composition of Functions $f ( x ) = \frac { 2 } { x ^ { 2 } }$

Multiple Choice

Find the requested composition of functions.
-Given $f ( x ) = \frac { 2 } { x ^ { 2 } }$ and $g ( x ) = x - 3$ , find $g \circ f ( x )$

A) $\frac { - 1 } { x ^ { 2 } }$
B) $\frac { 2 } { x ^ { 2 } - 3 }$
C) $\frac { 2 } { ( x - 3 ) ^ { 2 } }$
D) $\frac { 2 } { x ^ { 2 } } - 3$