List the Critical Values of the Related Function $$\frac { 1 } { x - 4 } \leq 0$$

Multiple Choice

List the critical values of the related function. Then solve the inequality.
- $$\frac { 1 } { x - 4 } \leq 0$$

A) $- 4,4 ; [ - 4,4 ]$
B) $4 ; ( - \infty , 4 )$
C) No critical values; $\varnothing$
D) $- 4 ; ( - \infty , - 4 ]$