A nurse is caring for an infant who has gastroesophageal reflux (GER). Which of the following actions should the nurse take to prevent regurgitation? (Select all that apply.)

Thicken the infant’s formula with cereal.

Avoid giving the infant citrus juices.

Position the child with their head elevated after meals.

Place the infant's head on a soft pillow while sleeping.

Administer an antiemetic to the infant.