$$\frac{(1 + \cos \theta)(\cosec \theta - \cot \theta)\sec \theta}{\sin \theta(1 - \sin \theta)(\sec \theta + \tan \theta)} = ?$$

A

$$\sec^2 \theta$$

B

$$\sin^2 \theta$$

C

$$\cos^2 \theta$$

D

$$\cosec^2 \theta$$