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

A

$$\tan\theta$$

B

$$\sec\theta$$

C

$$\csc\theta$$

D

$$\cot\theta$$