The male postpubertal state differs from the prepubertal in that
A. The gonads are responsive to gonadotrophic hormones.
B. There is a greater output of l7-ketosteroids in the urine.
C. Skeletal muscle is stronger per unit mass of tissue.
D. The circulating level of follicle-stimulating hormone is higher.
E. Hypothalamic output of gonadotrophin-releasing factors is greater.