If $$8k^{6} + 15k^{3} - 2 = 0$$, then the positive value of $$\left(k + \frac{1}{k}\right)$$ is:

A

$$2\frac{1}{2}$$

B

$$2\frac{1}{8}$$

C

$$8\frac{1}{2}$$

D

$$8\frac{1}{8}$$