The Nurse Is Teaching a Child and a Parent About

The nurse is teaching a child and a parent about taking methylphenidate (Ritalin) to treat attention-deficit/hyperactivity disorder (ADHD) . Which statement by the parent indicates understanding of the teaching?

A) "I should give this drug to my child at bedtime."
B) "My child should avoid products containing caffeine."
C) "The drug should be stopped immediately if my child develops aggression."
D) "We should monitor my child's weight since weight gain is common."