To Prevent a Reduction in Herd Immunity,what Should the Nurse

To prevent a reduction in herd immunity,what should the nurse teach a class of pregnant women?

A) "You should increase your intake of milk to meet your growing calcium needs."
B) "It is important to take your prenatal vitamins daily to provide the essential vitamins and minerals your body needs."
C) "You should ensure your child gets his or her immunizations at the recommended scheduled times."
D) "You should limit the time your child is in crowded environments for the first 6 months of his or her life."