Let $$f$$ be differentiable for all $$x$$. If $$f(1) = -2$$ and $$f'(x) \geq 2$$ for $$x \in [1, 6]$$, then

A

$$f(6) \geq 8$$

B

$$f(6) < 8$$

C

$$f(6) < 5$$

D

$$f(6) = 5$$