Simplify $$\frac{\cos 45^{\circ}}{\sec 30^{\circ} + \cosec 30^{\circ}}$$

A

$$\frac{3\sqrt{2} +\sqrt{6}}{8}$$

B

$$\frac{\sqrt{3}}{2\sqrt{2} - 2\sqrt{6}}$$

C

$$\frac{3\sqrt{2} - \sqrt{6}}{8}$$

D

$$\frac{\sqrt{3}}{2\sqrt{6} - 2\sqrt{2}}$$