The correct option is C Progesterone
The corpus luteum is a hormone-secreting temporary endocrine structure in the female reproductive system. It is formed in an ovary at the site of follicle or sac that has matured and released ovum. This corpus luteum (also called yellow body) secretes progesterone, a hormone that causes changes in the uterus that make it more suitable for implantation. It also secrets estradiol but at a very low concentration.
Thus, the correct answer is option B.