Applying Green's Theorem, the Area of the Region Bounded By x

Multiple Choice

Applying Green's Theorem, the area of the region bounded by $x = t - \sin t$ and $y = 1 - \cos t$ with $0 \leq t \leq 2 \pi$ is

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