Solve the Equation for X $\log 3 x = - 6$

Multiple Choice

Solve the equation for x. Give an exact solution.
- $\log 3 x = - 6$

A) $\{ - 18 \}$
B) $\left\{ \frac { 10 ^ { 3 } } { - 6 } \right\}$
C) $\left\{ \frac { 10 ^ { - 6 } } { 3 } \right\}$
D) $\{ - 20 \}$