The Area of the Surface Generated by Revolving the Curve $\le$

Multiple Choice

The area of the surface generated by revolving the curve x = 3 cos t, y = 3 sin t, 0 $\le$ t $\le$ $\pi$ about the x-axis is

A) 9 $\pi$
B) 36
C) 18 $\pi$
D) 45 $\pi$
E) 36 $\pi$