Find the X-Values (If Any) at Which the Function $f ( x ) = \frac { x } { x ^ { 2 } + 16 }$

Multiple Choice

Find the x-values (if any) at which the function $f ( x ) = \frac { x } { x ^ { 2 } + 16 }$ is not continuous. Which of the discontinuities are removable?

A) 4 and -4, not removable
B) continuous everywhere
C) 4 and -4, removable
D) discontinuous everywhere
E) none of the above