A nurse is reinforcing discharge teaching with the guardian of a preschooler who has a fiberglass arm cast. Which of the following statements by the guardian indicates an understanding of the teaching?

A. Ensuring the child’s arm doesn’t hang down for extended periods can help prevent swelling and discomfort. B. Submerging a fiberglass cast can damage the material and is not recommended. C. It is important to encourage the child to move their fingers to maintain circulation and prevent stiffness. D. Using a pencil to scratch inside the cast can cause injury or damage to the skin and should be avoided.