Correct Answer: B

Rationale: Difficulty swallowing (dysphagia) following radiation therapy to the neck area is a significant concern because it can indicate serious complications such as esophageal stricture, inflammation, or damage to the surrounding tissues, including the esophagus. This can lead to malnutrition, dehydration, or aspiration, all of which require prompt intervention. Radiation therapy can cause irritation and scarring in the esophageal and throat tissues, which may progressively worsen if not treated. Therefore, dysphagia should be addressed immediately to prevent further complications.

Correct Answer: D

Rationale: Clients with cancer, especially those undergoing chemotherapy or other immunosuppressive treatments, are at increased risk for infections due to a weakened immune system. Changing a litter box exposes the client to pathogens such as Toxoplasma gondii and other harmful bacteria or parasites found in cat feces, which could lead to serious infections. It is recommended that immunocompromised individuals avoid activities like changing litter boxes to reduce their risk of exposure to infectious agents. A family member or caregiver should handle this task to protect the client.

Correct Answer: D

Rationale: In myelodysplastic syndrome (MDS), the bone marrow does not produce enough healthy blood cells, leading to conditions such as anemia. Administering erythropoietin is an effective intervention to manage anemia in MDS patients because it stimulates the production of red blood cells. This can help improve the patient's hemoglobin levels, reducing symptoms such as fatigue and weakness associated with anemia. Erythropoietin is commonly used in MDS to enhance red blood cell production and reduce the need for frequent blood transfusions.

Correct Answer: C

Rationale: Fatigue is one of the most frequent and profound side effects of radiation therapy. It often occurs because radiation can damage both cancerous and healthy cells, and the body requires energy to repair the damage caused by the treatment. Fatigue from radiation can be cumulative, meaning it may worsen as treatments progress, and can significantly affect the client's daily activities, requiring the nurse to educate the client on energy conservation techniques.

Correct Answer: D

Rationale: While chemotherapy does affect normal, healthy cells-particularly those that divide rapidly-it is not "more likely" to kill normal cells compared to cancer cells. Chemotherapy targets rapidly dividing cells, which includes both cancer cells and some normal cells (like those in hair follicles, the gastrointestinal tract, and bone marrow). However, its primary goal is to kill cancer cells, and its effects on normal cells are a side effect, not the main function. Therefore, the statement that chemotherapy is "more likely" to kill normal cells is inaccurate and indicates a need for further teaching.