Find the Volume of the Solid Obtained by Rotating About $\pi$

Multiple Choice

Find the volume of the solid obtained by rotating about the x-axis the region lying under the curve above the x-axis and to the left of the y-axis.

A) 32 $\pi$ cubic units
B) 16 $\pi$ cubic units
C) 64 $\pi$ cubic units
D) 4 $\pi$ cubic units
E) 25 $\pi$ cubic units