What is the author's attitude toward Restak's researching conclusion

A．Women have a smaller brain size.
B．Women are not as intelligent as men.
C．Women and men differ in their brains.
D．Women have less developed frontal lobes.

A．how males and females think has something to do with their reproductive systems
B．male and female brains are different just as their reproductive systems are different
C．boys and girls have different brains when they have different reproductive systems
D．male and female reproductive systems determine why boys and girls think differently