A 10-year-old child with ADHD has been prescribed a stimulant medication. The parent reports that the child has been eating less since starting the medication. What is the most appropriate nursing intervention to address this side effect?

Advise the parent to discontinue the medication immediately.

Encourage the parent to eliminate all snacks between meals to promote hunger at mealtimes.

Encourage the parent to increase the child's physical activity to stimulate appetite.

Encourage the parent to make breakfast the most important meal of the day before administering the medication.