Solve the Equation and Express the Solution in Exact Form $\log 5 x = \log 3 + \log ( x - 4 )$

Multiple Choice

Solve the equation and express the solution in exact form.
- $\log 5 x = \log 3 + \log ( x - 4 )$

A) $\{ - 6 \}$
B) $\{ 6 \}$
C) $\left\{ - \frac { 3 } { 2 } \right\}$
D) $\left\{ - \frac { 1 } { 4 } \right\}$