Find the Requested Composition of Functions $f ( x ) = 6 x ^ { 2 } - 4$

Multiple Choice

Find the requested composition of functions.
-Given $f ( x ) = 6 x ^ { 2 } - 4$ and $g ( x ) = \frac { 5 } { x }$ , find $f \circ g ( x )$

A) $\frac { 150 } { x } - 4$
B) $\frac { 150 } { x ^ { 2 } } - 4$
C) $30 x - \frac { 20 } { x }$
D) $\frac { 5 } { 6 x ^ { 2 } - 4 }$