Folic acid supplements have become especially important for pregnant women. Why?
A) Folic acid supplies vitamins that pregnant women lose.
B) The folic acid stored by pregnant women is removed from their circulation.
C) The fetus makes high levels of folic acid.
D) Folic acid deprivation is associated with neural tube abnormalities in a fetus.
E) Folic acid deprivation is a cause of heart abnormalities in a newborn.