Each Is True of Prematernal and Postmaternal Weight,except One

Each is true of prematernal and postmaternal weight,except one.Which is the exception?

A) The goal for women who are overweight before pregnancy is to avoid excessive weight gain during pregnancy.
B) Women who gain more than 22 lbs during pregnancy are more likely to retain the weight.
C) The risk of spontaneous preterm birth decreases in underweight women.
D) Infants born to mothers who gain more than 50 lbs during pregnancy are at risk for higher body mass in later life.