If a Is the Area of the Intersection of the Regions

Multiple Choice

If A is the area of the intersection of the regions enclosed by the graphs of $r = 2 \cos \theta$ and $r = 2 \sin \theta,$ then A is

A) $\frac { 9 \pi - 18 } { 2 }$
B) $\frac { \pi } { 2 }$
C) $\frac { \pi + 1 } { 2 }$
D) $\frac { \pi - 2 } { 2 }$
E) $\frac { 8 - \pi } { 4 }$