Find the Square Root If It Is a Real Number $\sqrt { \frac { 49 } { 256 } }$

Multiple Choice

Find the square root if it is a real number, or state that the expression is not a real number.
- $\sqrt { \frac { 49 } { 256 } }$

A) $\frac { 1 } { 2 }$
B) $\frac { 7 } { 17 }$
C) $\frac { 3 } { 16 }$
D) $\frac { 7 } { 16 }$