Correct Answer: C

Rationale: Renal failure often necessitates fluid restriction to prevent fluid overload. In renal failure, the kidneys are unable to effectively filter and excrete excess fluids, leading to fluid accumulation in the body. Restricting fluid intake helps manage this condition by preventing further fluid buildup and complications such as edema and electrolyte imbalances.

Correct Answer: C

Rationale: High-pitched gurgles heard over the right lower quadrant indicate normal bowel sounds. Bowel sounds can vary in pitch, and high-pitched gurgles are considered normal and indicate the presence of active peristalsis in the intestines.

Correct Answer: C

Rationale: Sterile technique is utilized during invasive procedures to prevent the introduction of pathogens, minimizing the risk of infections. This strict approach ensures that the procedure is performed in a sterile environment, reducing the chances of contamination and subsequent complications.

Correct Answer: B

Rationale: In situations involving potential organ donation, the nurse's role is to provide support, listen to the family's concerns, and answer their questions truthfully. By doing so, the nurse can help facilitate an informed and respectful decision-making process for the grieving family.

Correct Answer: D

Rationale: As individuals age, various changes occur in the vascular system. These changes include increased peripheral resistance of the blood vessels, decreased blood flow, and an increased workload of the left ventricle. Therefore, all the listed changes result from aging, making option D, 'All of the above,' the correct answer.