Solve the Inequality $$\frac { x ^ { 2 } - 81 } { x ^ { 2 } + 81 } \geq 0$$

Multiple Choice

Solve the inequality.
- $$\frac { x ^ { 2 } - 81 } { x ^ { 2 } + 81 } \geq 0$$

A) $[ - 9,9 ]$
B) $( - \infty , - 81 ] \cup [ 81 , \infty )$
C) $[ 9 , \infty )$
D) $( - \infty , - 9 ] \cup [ 9 , \infty )$