A mother brings her 4-month-old infant for a well-baby checkup. The mother tells the nurse that she ...

A mother brings her 4-month-old infant for a well-baby checkup. The mother tells the nurse that she would like to start bottle feeding her baby because she cannot keep up with the demands of breastfeeding since returning to work.
 
  Which response by the nurse is appropriate?
  1) Make sure you give your baby an iron-fortified formula to supplement any stored breast milk you have.
  2) You really need to continue breastfeeding your baby.
  3) Give your baby formula until he is 6 months old; then you can introduce whole milk.
  4) Your baby weighs 14 pounds, so he will require about 36 ounces of formula a day.