Research Has Found That ______

Research has found that ______.

A) women are genetically superior to men in visual-spatial skills, on average, and men perform at lower levels than women no matter how much they are trained
B) women and men are equal, on average, in visual-spatial skills
C) although women, on average, are weaker in visual-spatial skills, even with brief training they eliminate the gap between theirs and men's skills
D) women, on average, are weaker than men in visual-spatial skills and they remain weaker no matter how much training they are given