Folic acid supplements have become especially important for pregnant women because

A)folic acid supplies vitamins that only pregnant women can use.
B)the folic acid is stored in adipose tissue by pregnant women so supplements are needed to make more available in the 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.