A nurse is caring for an 18-month-old infant who screams when the parent leaves the room. The parent seems very upset and says, "I don't understand why my child is so upset. I've never seen my child act this way before." Which of the following statements should the nurse make?

"This is a common reaction to the strange surroundings of the hospital."

"Children in this age have the most difficulty being separated from their parents. Are either of you able to room-in with your child?"

"This is a typical reaction for a child who is sick."

"This is a response to an overstimulating environment."