A. Chorionic gonadotropin: This hormone is produced during pregnancy and supports the corpus luteum but is not involved in male secondary sex characteristics or spermatogenesis. B. Progesterone: Progesterone is a female hormone involved in preparing the uterus for pregnancy, not male sexual development or sperm production. C. ACTH: Adrenocorticotropic hormone stimulates the adrenal cortex to produce cortisol; it does not affect male sex characteristics. D. Testosterone: Testosterone is the main male sex hormone responsible for sperm formation and the development of male secondary sex characteristics.