Find $\lim _ { x \rightarrow + \infty } \left[ \frac { x } { ( 3 + x ) ^ { 2 } } - 4 \right]$

Multiple Choice

Find $\lim _ { x \rightarrow + \infty } \left[ \frac { x } { ( 3 + x ) ^ { 2 } } - 4 \right]$ (if it exists) .

A) $- \frac { 1 } { 3 }$
B) 4
C) -4
D) $\infty$
E) does not exist