If $$\cos x + \sec x = \frac{7}{2\sqrt{3}}$$, then the value of $$\cos^{2}x + \sec^{2}x$$ will be ___________.

A

$$\frac{15}{12}$$

B

$$\frac{10}{12}$$

C

$$\frac{25}{10}$$

D

$$\frac{25}{12}$$