A nurse is assisting with a newborn hearing test when the parent enters and asks what the nurse is doing. Which of the following statements should the nurse make?

"This screening test is to see if your baby's brain is fully developed.”.

"This screening test is to see if your baby has a heart defect.”.

"This screening test is to see if your baby has a seizure disorder.”.

"This screening test is to see if your baby can hear various sounds.”.