A nurse is reinforcing teaching with the parents of a child who has ADHD and is taking methylphenidate. Which of the following statements by the parents indicates that the medication is effective?

A. Weight loss is a potential side effect of methylphenidate, but it is not a direct indicator of medication effectiveness. B. Correct. Improved ability to complete tasks like homework can be a positive indication of the medication's effectiveness in managing ADHD symptoms. C. Increased caloric intake might not be directly related to the medication's effectiveness. D. "A better grasp of reality" is a vague statement and not a specific indicator of ADHD medication effectiveness.