Rationalize the Numerator of the Expression and Simplify $$\frac { \sqrt { 3 ( x + h ) } - \sqrt { 3 x } } { h }$$

Multiple Choice

Rationalize the numerator of the expression and simplify.
- $$\frac { \sqrt { 3 ( x + h ) } - \sqrt { 3 x } } { h }$$

A) $\frac { 3 } { \sqrt { 3 x + 3 h } + \sqrt { 3 x } }$
B) $\frac { 6 x + 3 h } { h \sqrt { 3 x + 3 h } + \sqrt { 3 x } }$
C) $\frac { 3 h } { \sqrt { 3 x + 3 h } + \sqrt { 3 x } }$
D) $\frac { 3 } { \sqrt { 6 x + 3 h } }$