Correct Answer: A

Rationale: The correct answer is to administer oxygen therapy as prescribed. In COPD exacerbation, the priority is to improve oxygenation. Administering oxygen therapy helps ensure an adequate oxygen supply to the body's tissues. Elevating the head of the bed can improve ventilation but is not the first intervention needed in this situation. Obtaining a sputum culture and administering antibiotics are important in COPD exacerbation but come after ensuring proper oxygenation.

Correct Answer: B

Rationale: Serum triglycerides should be monitored closely in a client receiving TPN as they may indicate hyperlipidemia, which is a potential complication of TPN. Monitoring serum triglycerides is essential to prevent complications such as hypertriglyceridemia. Serum calcium and glucose levels are also important to monitor in clients receiving TPN, but in this scenario, serum triglycerides take priority due to the risk of hyperlipidemia.

Correct Answer: A

Rationale: During the initial visit, the most crucial intervention for the nurse is to determine how the client is cared for when the caregiver is not present. This is essential to ensure the client's safety and well-being, especially during times when the caregiver is not available. Option B is not the most important as it focuses on assessment rather than immediate safety concerns. Option C, while important, is secondary to ensuring continuous care. Option D is less critical during the initial visit compared to ensuring care continuity in the caregiver's absence.

Correct Answer: A

Rationale: The correct answer is A: Malignancy. A large, non-tender, hardened lymph node is a typical sign of malignancy and warrants further investigation. Choice B (Infection) is incorrect because typically in infections, lymph nodes are tender and may show signs of inflammation. Choice C (Benign cyst) is incorrect as a benign cyst would usually present as a soft, mobile lump. Choice D (Lymphadenitis) is incorrect as lymphadenitis usually presents with tender and enlarged lymph nodes due to inflammation.

Correct Answer: D

Rationale: Confusion and altered mental status are concerning in a client with chronic liver disease, as they may indicate hepatic encephalopathy, a serious complication that requires immediate intervention. Enlarged spleen (choice A) can be a common finding in liver disease due to portal hypertension but may not be as acute as hepatic encephalopathy. Increased abdominal girth (choice B) is typically seen in ascites, which is already present in this client. Yellowing of the skin (choice C) is a manifestation of jaundice, also a known symptom in liver disease but not as acute as confusion and altered mental status.