Correct Answer: C

Rationale: A heart rate of 90 beats per minute requires immediate intervention when assessing a client receiving a blood transfusion. This finding can indicate a potential transfusion reaction, such as a hemolytic reaction or fluid overload, which requires prompt evaluation and management to prevent serious complications. While a temperature of 100.4°F (38°C) may indicate a mild fever, it is not typically an immediate concern during a blood transfusion. A blood pressure of 110/70 mm Hg is within the normal range, and complaints of feeling cold can be addressed but do not indicate an urgent need for intervention compared to the critical nature of a potential transfusion reaction indicated by an elevated heart rate.

Correct Answer: A

Rationale: Flu-like symptoms can be an early sign of inhalation anthrax, and timely medical intervention is crucial.

Correct Answer: B

Rationale: Maintaining a healthy weight and exercising regularly are key factors in cancer prevention.

Correct Answer: A

Rationale: Antihistamines help reduce pruritus by blocking histamine receptors and are often prescribed for clients with chronic kidney disease experiencing pruritus.

Correct Answer: D

Rationale: Promoting bystander intervention is the most effective strategy as it empowers students to take action and prevent bullying incidents. By encouraging bystanders to intervene when they witness bullying, the behavior is less likely to continue. Zero-tolerance policies may have limited effectiveness as they often focus on punishment rather than prevention. Peer mediation and conflict resolution workshops are valuable but may not directly address the immediate need for bystander intervention in bullying situations.