Complete the Identity $$( 4 \sin \theta \cos \theta ) \left( 1 - 2 \sin ^ { 2 } \theta \right) = \text { ? }$$

Multiple Choice

Complete the identity.
- $$( 4 \sin \theta \cos \theta ) \left( 1 - 2 \sin ^ { 2 } \theta \right) = \text { ? }$$

A) $\sin ( 4 \theta )$
B) $\sin ( 2 \theta ) + \cos ( 2 \theta )$
C) $\frac { \cos ( 4 \theta ) } { \sin ( 2 \theta ) }$
D) $\sin ( 2 \theta ) \cos ( 2 \theta )$