Solve the Inequality $$- x ^ { 2 } - 15 x - 54 \geq 0$$

Multiple Choice

Solve the inequality. Write the solution set in interval notation.
- $$- x ^ { 2 } - 15 x - 54 \geq 0$$

A) $( - \infty , - 9 ] \cup [ - 6 , \infty )$
B) $( - \infty , - 9 ) \cup ( - 6 , \infty )$
C) $( - 9 , - 6 )$
D) $[ - 9 , - 6 ]$