Answer:
The answer is option a.progesterone, c.estrogen and option d. human chorionic gonadotropin.
Step-by-step explanation:
These hormones serve various functions.
I. Human chorionic gonadotropin: this signals the mother that pregnancy has occurred by maintaining the production of progesterone from the corpus luteum. This is what is detected during a pregnancy test.
ii. Progesterone maintains the pregnancy by supporting the lining of the uterus.
iii. estrogen stimulates the growth of the womb to accommodate the growing fetish.