To Prevent a Reduction in Herd Immunity, Which Information Does

To prevent a reduction in herd immunity, which information does the nurse teach in 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 prenatal vitamins daily to provide the essential vitamins and minerals your body needs."
C) "You should ensure your child gets immunizations at the recommended scheduled times."
D) "You should limit the time your child is in crowded environments for the first 6 months of life."