A nurse is caring for a client who is receiving radiation therapy to treat lung cancer. Which of the following actions should the nurse take?

A. Monitoring the mouth for signs of xerostomia is correct. Radiation therapy, especially when directed at the head, neck, or thoracic region, can damage salivary glands, leading to dry mouth (xerostomia). This can cause difficulty swallowing, dental issues, and increased risk of oral infections. Nursing interventions include assessing oral mucosa, encouraging frequent sips of water, and recommending saliva substitutes. B. Observing for signs of infection is always important in oncology care, but infection is not a primary concern specific to radiation therapy unless the client is immunocompromised from concurrent chemotherapy. C. Examining the skin for generalized urticaria is incorrect. Radiation typically causes localized skin reactions (erythema, desquamation, dryness) in the treatment field, not generalized hives or urticaria. D. Reviewing laboratory results for low hemoglobin may be relevant if the client is receiving concurrent chemotherapy, but anemia is not a direct expected effect of localized radiation therapy to the lung.