What Does the Variability Hypothesis State

What does the Variability Hypothesis state?

A) Behavioral and psychological differences within the gender are in most cases far less than between the gender groups.
B) Men and women should have nearly identical scores in behavioral and psychological measures.
C) Men have a shorter range of talents and deficits than women.
D) Men and women are likely to be similar on many behavioral and psychological measures but men's scores tend to group around the opposite ends of the spectrum.