Prior to Discharge from the Birth Hospital, the New Mother

Prior to discharge from the birth hospital, the new mother asks the nurse about the use of a mobile over the crib. The nurse would explain to the mother that the mobile should be placed about 10 inches above the level of the baby. The nurse would explain that this placement:

A) Is based on the fact that newborns can focus at a distance of 8 to 12 inches.
B) Will prevent the infant from being injured by the mobile.
C) Is most convenient for the parents.
D) Is for decoration only.The newborn does not have vision sufficient to see the mobile.