Secretion of Sex Hormones, Such as Testoterone and Estrogens, at Puberty

Secretion of sex hormones, such as testoterone and estrogens, at puberty ___.

A) increase the activity of osteoclasts and increase synthesis of extracellular matrix
B) decrease osteoblast activity and synthesis of extracellular matrix
C) increase osteoblast activity and synthesis of extracellular matrix
D) convert epiphyseal lines to epiphyseal plates in long bones
E) do none of these choices