Solve the Equation by Changing It to Exponential Form $\log _ { 9 } x = - 3$

Multiple Choice

Solve the equation by changing it to exponential form.
- $\log _ { 9 } x = - 3$

A) $x = - 9.3$
B) $x = - ( 3 ) ^ { 9 }$
C) $x = - \frac { 3 } { \log _ { 9 } 3 }$
D) $x = \frac { 1 } { 9 ^ { 3 } }$