Find Functions F and G So That F $f \circ g = H$

Multiple Choice

Find functions f and g so that f $f \circ g = H$
- $$H ( x ) = \frac { 1 } { x ^ { 2 } - 5 }$$

A) $f ( x ) = \frac { 1 } { x ^ { 2 } } ; \quad g ( x ) = - 1 / 5$
B) $f ( x ) = \frac { 1 } { x } ; \quad g ( x ) = x ^ { 2 } - 5$
C) $f ( x ) = x ^ { 2 } - 5 ; \quad g ( x ) = \frac { 1 } { x }$
D) $f ( x ) = \frac { 1 } { x ^ { 2 } } ; \quad g ( x ) = x - 5$