The parent of a 4 year old expresses concern because her hospitalized child has started sucking his thumb. the mother states that this behavior began 2 days after hospital admission. which of the following is the appropriate nursing response?
a. "it is best to ignore the behavior."
b. "your child is acting like a baby."
c. "the doctor will need to be notified."
d. "a 4 year old is too old for this type of behavior."