Final answer:
The correct statement that indicates an understanding of the discharge instructions for a client with laryngeal cancer undergoing radiation therapy is "I will avoid using a mild, non-alcoholic mouthwash.", as this aligns with the use of special mouthwashes recommended to alleviate side effects of the treatment.
Step-by-step explanation:
The client's understanding of discharge instructions for laryngeal cancer receiving radiation therapy is indicated through their ability to choose correct behaviors during their treatment. Answer b) "I will avoid using a mild, non-alcoholic mouthwash." indicates correct understanding since special mouthwashes are often recommended to manage radiation therapy side effects like a dry mouth and cavities. Answers a), c), and d) suggest misunderstandings since smoking should be avoided during radiation therapy, heating pads are not recommended for radiation-induced skin irritation (cool compresses are generally recommended), and fluid intake should not be limited as hydration is important.