A nurse is teaching the guardian of a school-age child who has autism spectrum disorder about a new prescription for risperidone. Which of the following statements by the guardian demonstrates an understanding of the teaching?

"This medication will help control my child's aggressive behavior."

"This medication can cause my child to have low blood sugar."

"This medication won't require my child to have routine lab tests."

"This medication might need to be increased if my child has muscle spasms."