Solve the Inequality $$x ^ { 2 } - 4 x - 12 \leq 0$$

Multiple Choice

Solve the inequality. Use algebra to solve the corresponding equation.
- $$x ^ { 2 } - 4 x - 12 \leq 0$$

A) $( - \infty , - 2 ] \cup [ 6 , \infty )$
B) $( - \infty , - 2 ]$
C) $[ 6 , \infty )$
D) $[ - 2,6 ]$