Find the Volume of the Indicated Region $x y$ -Plane, Laterally by the Cylinder

Multiple Choice

Find the volume of the indicated region.
-the region bounded below by the $x y$ -plane, laterally by the cylinder $r = 4 \cos \theta$ , and above by the plane $z = 3$

A) $12 \pi$
B) $3 \pi$
C) $36 \pi$
D) $9 \pi$