Correct Answer: D

Rationale: The correct answer is D. Ethical principles can influence the creation of laws but are not equivalent to laws themselves. Laws are established by governing bodies to provide a framework for society, whereas ethical principles guide individuals' moral conduct. Choice A is incorrect because governments enforce laws, not ethics. Choice B is incorrect as laws set legal standards rather than ethical ones. Choice C is incorrect because ethics are principles that guide behavior but are not necessarily highly specific.

Correct Answer: C

Rationale: A magnesium level of 1.0 mg/dL can cause a depressed ST segment on the ECG. Magnesium deficiency commonly leads to ST segment depression on an electrocardiogram. Prominent U waves are associated with hypokalemia, prolonged PR interval is seen in conditions like first-degree heart block, and widened QRS complexes are typically related to conditions affecting the conduction system of the heart, such as bundle branch blocks.

Correct Answer: D

Rationale: To improve retention of newly hired nurses, the nurse manager should focus on building their own leadership skills and relationships with staff members. By creating a supportive environment and demonstrating effective leadership, the manager can positively impact staff retention. Options A, B, and C do not directly address the core issue of creating a supportive work environment and effective leadership, which are crucial for retaining newly hired nurses.

Correct Answer: D

Rationale: In diabetic ketoacidosis (DKA), there is an excess of ketone bodies produced due to the breakdown of fatty acids for energy, leading to metabolic acidosis. An increased anion gap is a characteristic laboratory finding in DKA. The increased anion gap is a result of the accumulation of ketoacids and lactic acid in the blood, contributing to metabolic acidosis. Therefore, the correct answer is an increased anion gap. Choices A, B, and C are incorrect because in DKA, blood glucose levels are typically elevated, urine ketones are increased due to the breakdown of fatty acids, and serum bicarbonate is usually decreased as it is consumed in an attempt to buffer the acidosis.

Correct Answer: D

Rationale: Conveying empathy, trust, and respect can help reduce the client's anxiety and improve their overall experience during treatment. This approach creates a supportive environment and fosters a sense of safety and understanding for the client. Administering a sedative (Choice A) should not be the initial intervention for anxiety, as it does not address the underlying emotional needs of the client. Making sure the client knows all the correct medical terms (Choice B) may increase anxiety by overwhelming the client with technical information. Ignoring signs and symptoms of anxiety (Choice C) can lead to worsening distress and potential complications in the client's care.