Find the Area of the Specified Region $r = 3 \sin 2 \theta$

Multiple Choice

Find the area of the specified region.
-Inside one leaf of the four-leaved rose $r = 3 \sin 2 \theta$

A) $\frac { 3 \pi } { 2 }$
B) $\frac { 9 \pi } { 8 }$
C) $\frac { 9 \pi } { 2 }$
D) $\frac { 9 \pi } { 8 } - \frac { 9 } { 16 }$