During a Follow-Up Prenatal Visit, a Pregnant Woman Asks the Nurse

During a follow-up prenatal visit, a pregnant woman asks the nurse, "How long do you think I will be in labor?" Which response by the nurse would be most appropriate?

A) "It's difficult to predict how your labor will progress, but we'll be there for you the entire time."
B) "Since this is your first pregnancy, you can estimate it will be about 10 hours."
C) "It will depend on how big the baby is when you go into labor."
D) "Time isn't important; your health and the baby's health are key."