Find the Range of the Quadratic Function $$f ( x ) = - 3 x ^ { 2 } - 3 x$$

Multiple Choice

Find the range of the quadratic function.
- $$f ( x ) = - 3 x ^ { 2 } - 3 x$$

A) $\left( - \infty , \frac { 3 } { 4 } \right]$
B) $\left( - \infty , - \frac { 3 } { 4 } \right]$
C) $\left( - \infty , - \frac { 1 } { 2 } \right]$
D) $\left( - \infty , \frac { 1 } { 2 } \right]$