Find the Area of the Region That Lies Inside the First

Multiple Choice

Find the area of the region that lies inside the first curve and outside the second curve.
$$r = 3 \cos \theta , \quad r = 1 + \cos \theta$$

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