Solve the Equation and Express the Solution in Exact Form $\ln 2 x + \ln 9 x = \ln 19$

Multiple Choice

Solve the equation and express the solution in exact form.
- $\ln 2 x + \ln 9 x = \ln 19$

A) $\{ 0 \}$
B) $\left\{ \frac { \mathrm { e } ^ { 19 } } { 18 } \right\}$
C) $\{ 1 \}$
D) $\left\{ \left( \frac { 19 } { 18 } \right) ^ { 1 / 2 } \right\}$