Correct Answer: A

Rationale: The correct answer is A: Limit sodium intake to reduce fluid retention. Limiting sodium intake is crucial for managing congestive heart failure (CHF) as it helps reduce fluid retention. Excess fluid retention can worsen CHF by increasing the workload on the heart. Choice B is incorrect because while protein is essential for overall health, it is not directly related to managing CHF. Choice C is incorrect because potassium, although important, is not the primary focus in managing CHF. Choice D is incorrect because increasing fluid intake can exacerbate fluid retention in CHF patients.

Correct Answer: C

Rationale: The correct answer is C: Bananas. Bananas are high in potassium and should be avoided in clients who are on a low-potassium diet due to chronic kidney disease. Foods like apples and white bread are low in potassium and are safer choices. Carrots are also low in potassium and do not need to be avoided in this case.

Correct Answer: D

Rationale: The correct answer is D: Reduced preload. Furosemide is a diuretic that reduces fluid overload in heart failure, which lowers the preload (the volume of blood in the ventricles before contraction). By reducing this volume, furosemide improves symptoms of heart failure. While furosemide may lead to increased urine output and lower blood pressure, these effects are secondary to the reduction in preload. Decreased heart rate is not a direct effect of furosemide in heart failure.

Correct Answer: C

Rationale: The correct answer is C: Assessing a client's pain level. This task involves clinical judgment and interpretation, which are within the scope of a licensed nurse's practice. Delegating pain assessment to unlicensed personnel could lead to errors in pain management and inappropriate interventions. Choices A, B, and D involve tasks that can be safely delegated to unlicensed assistive personnel as they do not involve interpretation or nursing judgment. Taking a client's blood pressure, providing oral hygiene, and assisting with ambulation are all routine tasks that can be appropriately assigned to UAP under the supervision of a licensed nurse.

Correct Answer: B

Rationale: A fever of 103 degrees Fahrenheit indicates that the infection is not under control despite antibiotic therapy. Fever is a common sign of ongoing infection or inadequate response to treatment. Nausea and vomiting, diffuse macular rash, and muscle tenderness are not typically indicative of the effectiveness of antibiotic therapy in treating infective endocarditis.