Solve the Nonlinear System of Equations $$\left\{ \begin{aligned}x ^ { 2 } + y ^ { 2 } & = 81 \\y & = \frac { 1 } { 9 } x ^ { 2 } - 9\end{aligned} \right.$$

Multiple Choice

Solve the nonlinear system of equations.
- $$\left\{ \begin{aligned}x ^ { 2 } + y ^ { 2 } & = 81 \\y & = \frac { 1 } { 9 } x ^ { 2 } - 9\end{aligned} \right.$$

A) $( - 9,0 ) , ( 0,9 ) , ( 0 , - 9 )$
B) $( - 9,0 ) , ( 9,0 ) , ( 0 , - 9 )$
C) $( - 9,0 ) , ( 9,0 )$
D) $( - 9,0 ) , ( 9,0 ) , ( 0,9 )$