Solve the Inequality $x ^ { 2 } + 6 x \leq - 8$

Multiple Choice

Solve the inequality.
- $x ^ { 2 } + 6 x \leq - 8$

A) $x \leq 2 \text { or } x \geq 4$
B) $2 < x < 4$
C) $2 \leq x \leq 4$
D) $- 4 \leq x \leq - 2$