Which of the Following Difference in Brain Structure or Function

Which of the following difference in brain structure or function may be partly responsible for gender differences in reading and verbal abilities?

A) Females have proportionally more gray matter than males.
B) Males' brains are more symmetrical than females' brains.
C) Males are more likely than females to use language-related areas of their brains to solve complex problems.
D) The proportion of gray and white matter is more similar in the two hemispheres of the brain in males than in females.