A School-Aged Child Is Being Treated for an Overdose of Cough

A school-aged child is being treated for an overdose of cough medicine administered by the parent. The child is 12 years of age and weighs 98 pounds. The label on the bottle states not to give the medication to children younger than 6 years, and provides a dosing chart that indicates an adult dose for children over 50 kg. For which reason does the nurse suspect the overdose occurred?

A) The cough continued after being medicated.
B) The parent misunderstood weight parameters.
C) The parent measured with a household spoon.
D) The parent attempted to induce sleep in the child.