Which of the following accounts best for the fact that $$\text{F}^-$$ is smaller than $$\text{O}^{2-}$$?

A

$$\text{F}^-$$ has a larger nuclear mass than $$\text{O}^{2-}$$

B

$$\text{F}^-$$ has a larger nuclear charge than $$\text{O}^{2-}$$

C

$$\text{F}^-$$ is more polarizable than $$\text{O}^{2-}$$

D

F is more electronegative than O