Find the Domain and Range of the Function $$f ( x ) = - x ^ { 2 } - 8 x - 21$$

Multiple Choice

Find the domain and range of the function.
- $$f ( x ) = - x ^ { 2 } - 8 x - 21$$

A) Domain: $( - \infty , \infty )$ ; Range: $( - \infty , 4 ]$
B) Domain: $( - \infty , \infty )$ ; Range: $( - \infty , - 5 ]$
C) Domain: $( - \infty , - 5 ]$ ; Range: $[ 4 , \infty )$
D) Domain: $( - \infty , \infty )$ ; Range: $[ 5 , \infty )$