A Parent Is Concerned About How to Make His Preschool-Age

A parent is concerned about how to make his preschool-age child stop sucking his thumb and asks the nurse for suggestions. The nurse's most helpful response would be:

A) Most children will stop thumb-sucking naturally by school age.
B) Over-the-counter treatments that give a bad taste can be placed on the thumb to discourage the practice.
C) Consistently touching the child's fingers whenever he sucks his thumb is most effective.
D) Thumb-sucking is detrimental to the eruption of the child's teeth and must be stopped as soon as possible.