Rationalize the Denominator and Simplify $\frac { 9 } { \sqrt { 22 } }$

Multiple Choice

Rationalize the denominator and simplify. Assume all variables represent nonnegative real numbers.
- $\frac { 9 } { \sqrt { 22 } }$

A) $\frac { 81 \sqrt { 22 } } { 22 }$
B) 493
C) $9 \sqrt { 22 }$
D) $\frac { 9 \sqrt { 22 } } { 22 }$