If $$\tan^{2} \theta = 1 - a^{2}$$, then the value of $$\sec \theta + \tan^{3} \theta \cosec \theta$$ is:

A

$$(2 - a)^{\frac{3}{2}}$$

B

$$(a^{2} - 2)^{\frac{3}{2}}$$

C

$$(2 - a^{2})^{\frac{3}{2}}$$

D

$$a^{\frac{3}{2}}$$