Evaluate the Integral $\int_{0}^{\pi / 2} 5 \sqrt{1-\cos 4 \theta} d \theta$

Multiple Choice

Evaluate the integral. $\int_{0}^{\pi / 2} 5 \sqrt{1-\cos 4 \theta} d \theta$

A) $\frac{\sqrt{2}}{3}$
B) $3 \sqrt{3}$
C) $2 \sqrt{3}$
D) $2 \sqrt{2}$
E) $5 \sqrt{2}$