If $$\tan \theta + \sin \theta = A$$ and $$\tan \theta - \sin \theta = B$$, then what is the value of $$A^2 - B^2$$?

A

$$\tan \theta \sin \theta$$

B

$$4 \cot \theta$$

C

$$4 \tan \theta \sin \theta$$

D

$$2 \tan \theta \sin \theta$$