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?

Choice A reason: Infection risk increases with chemotherapy, not typically radiation. Radiation to the chest may cause xerostomia if salivary glands are affected, making mouth monitoring more relevant. Infection is a general concern but not specific to lung radiation effects. Choice B reason: Low hemoglobin is more associated with chemotherapy-induced anemia. Radiation to the lungs primarily causes local effects like xerostomia or esophagitis. Monitoring the mouth for dryness is more specific to radiation’s impact, making hemoglobin less relevant. Choice C reason: Generalized urticaria suggests an allergic reaction, not a common radiation effect. Radiation to the lungs may cause xerostomia due to salivary gland exposure, making mouth monitoring a priority over skin assessment for unrelated allergic signs. Choice D reason: Monitoring for xerostomia is critical, as radiation to the chest can affect salivary glands, causing dry mouth, which increases infection and discomfort risks. This is a common side effect of lung cancer radiation, making it the most appropriate nursing action.