Determine the Value or Values That Are Excluded from the Following

Multiple Choice

Determine the value or values that are excluded from the following expression.
- $$f ( x ) = \frac { x } { 3 x - 8 }$$

A) $- \frac { 3 } { 8 } , 0$
B) $- \frac { 8 } { 3 }$
C) $\frac { 3 } { 8 } , 0$
D) $\frac { 8 } { 3 }$