During childbirth, each gland plays a specific role:

A) Thyroid gland produces oxytocin, which stimulates uterine contractions.
B) Pituitary gland releases oxytocin, which stimulates uterine contractions, and prolactin, which promotes milk production.
C) Adrenal glands produce adrenaline, which increases heart rate and blood pressure.
D) Pancreas secretes insulin to regulate blood sugar levels.