Which of the Following Is True of the Relationship Between

Which of the following is true of the relationship between maternal stress during pregnancy and outcomes for the baby?

A) Maternal stress increases the flow of blood to the fetus.
B) Women who report greater anxiety during pregnancy more often give birth early or have babies who weigh less than average.
C) Stress does not seem to affect a pregnant woman's immune system.
D) The effects of occasional, mild anxiety are the same as those associated with prolonged, extreme stress.