Becky's 2-Year Old Son Can't Walk Because He Was Born

Becky's 2-year old son can't walk because he was born with spina bifida.To reduce the chances that her next baby is born with a neural tube defect,Becky should

A) consume green leafy vegetables,drink orange juice,and take a folic acid supplement before getting pregnant.
B) eat at least 3 ounces of fatty fish three times a week,take vitamin A and D supplements and drink more fat-free milk during the first three months of pregnancy.
C) take pantothenic acid,B-6,and B-12 supplements before getting pregnant.
D) take iron,zinc,and magnesium supplements during the first month of pregnancy,then eat more whole-grain breads and cereals for the remaining months of pregnancy.