A Mother Tells You That Her 4-Year-Old Child Has Begun

A mother tells you that her 4-year-old child has begun to have night waking and has started thumb sucking again. Otherwise the child seems very healthy. From this brief history, your immediate response is:

A) "It is normal for preschool-aged children to go through some short periods of regression."
B) "What changes have happened in your family or with your child?"
C) "Is there any possibility of pinforms or some other type of parasite that your child might have?"
D) "You need to call your pediatrician right away and get a complete physical on this child."