Solve the Quadratic Inequality $$x ^ { 2 } + 7 x \leq - 12$$

Multiple Choice

Solve the quadratic inequality. Write the solution set in interval notation.
- $$x ^ { 2 } + 7 x \leq - 12$$

A) $( - \infty , 3 ] \cup [ 4 , \infty )$
B) $( 3,4 )$
C) $[ 3,4 ]$
D) $[ - 4 , - 3 ]$