Who Is Most Likely to Have a Low-Birth-Weight Baby

Who is most likely to have a low-birth-weight baby?

A) Adele,who is 25,in good health,and has had one normal delivery
B) Bianca,who is 40,in generally good health but has high blood pressure,and has had no previous pregnancies
C) Carol,who is 17,pregnant for the first time,and in good health
D) Dana,who is 37,underweight,smokes,and has had five previous pregnancies