If $f ( x ) = x ^ { 3 } - 5$

Multiple Choice

If $f ( x ) = x ^ { 3 } - 5$ and $g ( x ) = \sqrt [ 3 ] { x + 5 }$ , then which of the following is/are true?

A) $( f \circ g ) ( x ) = x$ and $( g \circ f ) ( x ) = x$
B) $f$ is the inverse function of $g$
C) $g$ is the inverse function of $f$
D) All of the above are true.