Find the Volume of the Solid Generated by Revolving the Region

Multiple Choice

Find the volume of the solid generated by revolving the region bounded by the curve $y = 2 \cos x$ and the $x$ -axis, $\frac { \pi } { 2 } \leq x \leq \frac { 3 \pi } { 2 }$ , about the $x$ -axis.

A) $2 \pi ^ { 2 }$
B) $4 \pi ^ { 2 }$
C) $2 \pi ^ { 3 }$
D) $4 \pi$