Rationalize the Denominator $\sqrt { \frac { 4 } { x } }$

Multiple Choice

Rationalize the denominator. Assume that all variables represent positive numbers.
- $\sqrt { \frac { 4 } { x } }$

A) $\frac { 2 } { x }$
B) $\frac { 2 \sqrt { x } } { x }$
C) $\frac { 2 \sqrt { x } } { x ^ { 2 } }$
D) $\frac { 4 \sqrt { 2 x } } { x }$