Find the Volume of the Solid Generated by Revolving the Shaded

Multiple Choice

Find the volume of the solid generated by revolving the shaded region about the given axis.
-About the $x$ -axis
$y = 2 \sqrt { \sin x }$

A) $2 \pi ^ { 2 } - 2 \pi$
B) $2 \pi ^ { 2 } + 4 \pi$
C) $2 \pi ^ { 2 }$
D) $2 \pi ^ { 2 } - 4 \pi$