For the Given Functions F and G , Find the Indicated

Multiple Choice

For the given functions f and g , find the indicated composition.
- $$f ( x ) = \frac { 3 } { x + 6 } , \quad g ( x ) = \frac { 5 } { 6 x }$$
$( f \circ g ) ( x )$

A) $\frac { 18 x } { 5 - 36 x }$
B) $\frac { 3 x } { 5 + 36 x }$
C) $\frac { 18 x } { 5 + 36 x }$
D) $\frac { 5 x + 30 } { 18 x }$