Simply the Expression $\frac { y - 33 } { \sqrt { y } + \sqrt { 33 } }$

Multiple Choice

Simply the expression. Assume that all variable expressions represent positive real numbers.
- $\frac { y - 33 } { \sqrt { y } + \sqrt { 33 } }$

A) $y - \sqrt { 33 }$
B) $y + \sqrt { 33 }$
C) $\sqrt { y } + \sqrt { 33 }$
D) $\sqrt { y } - \sqrt { 33 }$