Which of these is a class of prescription drugs that depress central nervous system activity?

During puberty,

A) the cephalocaudal growth trend of infancy and childhood reverses. B) the torso accelerates first, followed by the hands, legs, and feet. C) the average child gains 20 to 35 pounds. D) girls' shoulders broaden relative to the hips.

In a study of persons with similar IQs, it was found that

a. men had more gray matter, while women had more white matter. b. men's gray and white matter were concentrated more in their frontal lobes. c. women's gray matter was equally split between the frontal and parietal lobes. d. women's white matter was concentrated in their temporal lobes.