The correct answer are: the testes, the ovary and the adrenal gland.
Secondary sex characteristics are characteristics that appear during puberty in humans when hormone level rises. Testosterone(testes) and estrogen(ovary) have the main influence in manifesting secondary sex characteristics. The function of the adrenal gland is to produce androgens: DHEA (dehydroepiandrosterone) which can be intermediate in the biosynthesis of the androgen and estrogen sex steroids.