If $$\sec 31^\circ = x,$$ then $$\sin^2 59^\circ + \frac{1}{\sec^2 31^\circ} - \frac{1}{\sec^2 59^\circ \cosec^2 59^\circ}$$ is equal to:

A

$$\frac{x^2 - 2}{x^2}$$

B

$$\frac{2 - x^2}{x}$$

C

$$\frac{2 - x^2}{x^2}$$

D

$$\frac{x^2 - 2}{x}$$