The value of $$\frac{3 \tan^2 60^\circ + \sec^2 30^\circ - \sin^2 45^\circ}{(\cos 15^\circ + \sin 75^\circ)(\sec 15^\circ + \cosec 75^\circ)}$$ is:

A

$$\frac{5}{12}$$

B

$$\frac{65}{24}$$

C

$$\frac{13}{12}$$

D

$$\frac{59}{24}$$