A primiparous client with a neonate who is 36 hours old asks the nurse, “Why does my baby spit up a small amount of formula after feeding?” The nurse explains that the regurgitation is thought to...

A primiparous client with a neonate who is 36 hours old asks the nurse, “Why does my baby spit up a small amount of formula after feeding?” The nurse explains that the regurgitation is thought to result from which of the following?

1. An immature cardiac sphincter.

2. A defect in the gastrointestinal system.

3. Burping the infant too frequently.

4. Moving the infant during the feeding.