Find the Area of the Specified Region $r ^ { 2 } = a ^ { 2 } \sin 2 \theta , a > 0$

Multiple Choice

Find the area of the specified region.
-Inside the lemniscate $r ^ { 2 } = a ^ { 2 } \sin 2 \theta , a > 0$

A) $a ^ { 2 }$
B) 0
C) $\frac { a ^ { 2 } } { 2 }$
D) $\pi a ^ { 2 }$