Simplify by Rationalizing the Denominator $\frac { 5 } { \sqrt { 10 } + \sqrt { 15 } }$

Multiple Choice

Simplify by rationalizing the denominator.
- $\frac { 5 } { \sqrt { 10 } + \sqrt { 15 } }$

A) $\sqrt { 15 } + \sqrt { 10 }$
B) $\sqrt { 5 }$
C) $\sqrt { 15 } - \sqrt { 10 }$
D) $\sqrt { 10 } - \sqrt { 15 }$