The nurse is educating a group of new mothers about their infants' sense of smell. Which statements should the nurse include in the teaching? Select all that apply.

1. "Infants can detect the odor of breast milk."
2. "Preterm infants react to strong alcoholic odors."
3. "Preterm infants are attracted to the smell of vinegar."
4. "Infants do not have a sense of smell until 1 year of age."
5. "Infants can identify their mothers through sense of smell."