The domain of the function $$f(x) = \frac{1}{\sqrt{[x]^2 - 3[x] - 10}}$$ is (where $$[x]$$ denotes the greatest integer less than or equal to $$x$$)

A

$$(-\infty, -3] \cup (5, \infty)$$

B

$$(-\infty, -2) \cup [6, \infty)$$

C

$$(-\infty, -2) \cup (5, \infty)$$

D

$$(-\infty, -3] \cup [6, \infty)$$