Research on Male-Female Differences in Brain Size ______

Research on male-female differences in brain size ______.

A) shows that women's slightly lower scores on IQ tests are due to their slightly smaller brains
B) shows that men have several different advantages because of their larger brain size
C) has failed to demonstrate a relationship, in humans, between brain size and intelligence
D) shows that although women's brain size is smaller, they outperform males on IQ tests