What is the value of $$\frac{\sin \theta + \cos \theta}{\sin \theta - \cos \theta} + \frac{\sin \theta - \cos \theta}{\sin \theta + \cos \theta}$$

A

$$1/(\sin^{2} \theta - \cos^{2}\theta)$$

B

$$2(\sin^{2} \theta - \cos^{2}\theta)$$

C

$$2/(\sin^{2} \theta - \cos^{2}\theta)$$

D

$$\sin^{2} \theta - \cos^{2}\theta$$