Find $\lim _ { x \rightarrow 2 } \frac { 9 x } { \sqrt { x + 9 } }$

Multiple Choice

Find $\lim _ { x \rightarrow 2 } \frac { 9 x } { \sqrt { x + 9 } }$ by direct substitution.

A) 1
B) $18 \sqrt { 11 }$
C) $\frac { 18 } { \sqrt { 11 } }$
D) $\sqrt { 11 }$
E) $18$