Use the Half-Angle Formulas to Simplify the Expression $\sqrt { \frac { 1 - \cos 10 x } { 2 } }$

Use the half-angle formulas to simplify the expression.
$\sqrt { \frac { 1 - \cos 10 x } { 2 } }$

A) |sin 5x|
B) - |sin x|
C) |sin 10x|
D) - |sin 5x|
E) |sin x|