Find All Relative Extrema of the Function $f ( x ) = \frac { 4 } { x ^ { 2 } + 2 }$

Multiple Choice

Find all relative extrema of the function $f ( x ) = \frac { 4 } { x ^ { 2 } + 2 }$ . Use the Second-Derivative Test when applicable.

A) The relative maximum is $( 2,0 )$ .
B) The relative minimum is $( 0,2 )$ .
C) The relative maximum is $( 0,2 )$ .
D) The relative minimum is $( 0,2 )$ .
E) The relative maximum is $( 4,0 )$ .