The value of $$\frac{\sqrt{2}\tan(60^\circ - \theta) \tan(30^\circ + \theta)}{\sin^2 (45^\circ + \theta) + \sin^2 (45^\circ - \theta)}$$ is:

A

$$\sqrt{2}$$

B

2

C

1

D

$$\frac{1}{\sqrt{2}}$$