Consider Larry Summers' Assertion That the Underrepresentation of Women in Science

Consider Larry Summers' assertion that the underrepresentation of women in science is partly due to sex differences in the natural variability of cognitive abilities. What does the research on sex differences in cognitive abilities say about the truth of Summers' statement?

A) Some evidence does suggest greater male variability, but we lack evidence that such variability is explained by nature alone.
B) Meta-analyses indicate that differences in variability are either near zero or entirely dependent upon country and ethnicity.
C) Contrary to the controversy, research actually supports Summers' comments. Research does point to greater male variability that is unexplained by culture.
D) The existing evidence is too inconsistent and variable to definitively reject or support Summers' statements.