Solve the Equation and Express the Solution in Exact Form $$\ln ( - x ) + \ln 4 = \ln ( 3 x - 9 )$$

Multiple Choice

Solve the equation and express the solution in exact form.
- $$\ln ( - x ) + \ln 4 = \ln ( 3 x - 9 )$$

A) $\left\{ - \frac { 9 } { 7 } \right\}$
B) $\left\{ \frac { 7 } { 9 } \right\}$
C) $\varnothing$
D) $\left\{ \frac { 9 } { 7 } \right\}$