Final answer:
The 2nd stage of labor and delivery accomplishes the delivery of the baby, following full dilation of the cervix.
Step-by-step explanation:
The 2nd stage of labor and delivery is when the baby is expelled from the uterus. During the first stage, the cervix thins and dilates to about 10 cm. Once full dilation is achieved, the second stage commences with the uterus contracting and the person giving birth actively pushing, using their abdominal muscles to aid delivery. After the baby is born, the third stage involves the delivery of the placenta. If necessary, synthetic oxytocin, known as Pitocin, can be administered to restart or maintain labor if it stalls before the second stage is reached.
Therefore, the correct answer to the question is b) Delivery of the baby.