Rationalize the Denominator and Simplify $\sqrt { \frac { 49 } { 12 } }$

Multiple Choice

Rationalize the denominator and simplify. Assume all variables represent nonnegative real numbers.
- $\sqrt { \frac { 49 } { 12 } }$

A) $\frac { 7 \sqrt { 3 } } { 3 }$
B) $\frac { 7 \sqrt { 3 } } { 6 }$
C) 12
D) $7 \sqrt { 3 }$