$$\left(\frac{\tan^{3}\theta}{\sec^{2}\theta}+\frac{\cot^{3}\theta}{\csc^{2}\theta}+2\sin\theta\cos\theta\right)\div\left(1+\csc^{2}\theta+\tan^{2}\theta\right), 0^\circ < \theta < 90^\circ$$, is equal to:

A

$$\csc\theta$$ $$\sec\theta$$

B

$$\csc\theta$$

C

$$\sin\theta$$ $$\cos\theta$$

D

$$\sec\theta$$