The nurse is evaluating discharge teaching of an adolescent who had a long leg plaster cast applied in the emergency department. Which statement by the adolescent indicates an understanding of cast care?

A. Avoiding showers until the cast is removed is correct for a plaster cast because it is not waterproof and can lose integrity if it becomes wet. B. Tingling may indicate compromised circulation or nerve compression and requires immediate medical evaluation, not just elevation. C. Using an object to scratch under the cast is unsafe because it can cause skin injury and infection. D. Applying adhesive tape to the cast edges is not recommended; rough edges should be addressed by a healthcare provider to prevent skin irritation.