Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Solve the equation.
- $$\frac { 3 } { x } + \frac { 3 } { x - 4 } = \frac { 3 x - 9 } { x - 4 }$$

A) $\left\{ - \frac { 5 } { 2 } , \frac { 1 } { 3 } \right\}$
B) $\{ 1 \}$
C) \{ }
D) $\{ 4,1 \}$