If $$\cosec 31^\circ = x,$$ then 

$$\sin^2 59^\circ + \frac{1}{\cosec^2 31^\circ} + \tan^2 59^\circ - \frac{1}{\sin^2 59^\circ \cosec^2 59^\circ}$$ is equal to:

A

x - 1

B

$$x^2 + 1$$

C

$$x^2 - 1$$

D

x + 1