Find $\lim _ { x \rightarrow - 3 } \left( \frac { 1 } { 3 } x ^ { 3 } - 7 x \right)$

Multiple Choice

Find $\lim _ { x \rightarrow - 3 } \left( \frac { 1 } { 3 } x ^ { 3 } - 7 x \right)$ by direct substitution.

A) -30
B) 48
C) 12
D) -34
E) limit does not exist