Correct Answer: C

Rationale: The correct intervention for a client with a platelet count of 20,000/mm3 due to chemotherapy is to avoid invasive procedures. Chemotherapy can cause a decrease in platelet count, leading to an increased risk of bleeding. By avoiding invasive procedures, the nurse helps reduce the risk of bleeding complications. Applying ice packs to bruised areas (Choice A) may further increase the risk of bleeding due to the pressure and potential trauma to the skin. Encouraging frequent oral hygiene (Choice B) is important for overall health but does not directly address the risk of bleeding associated with a low platelet count. Placing the client in a private room (Choice D) is not directly related to managing the platelet count and risk of bleeding; it is more about privacy and infection control, which are important but not the priority in this scenario.

Correct Answer: A

Rationale: Offering free cancer screenings is the most likely activity to increase participation in the health fair. Providing direct services such as screenings not only attracts participants but also promotes early detection, which is crucial in cancer prevention. Distributing pamphlets, hosting a guest speaker, or providing informational booths are informative but may not have the same impact in driving participation as the opportunity for free screenings.

Correct Answer: C

Rationale: Prioritizing the topic of the importance of a balanced diet is crucial as it provides a fundamental understanding for parents to establish healthy eating habits for their children. Understanding the importance of a balanced diet helps parents make informed decisions about food choices, portion sizes, and meal planning. Option A, focusing on the benefits of organic foods, while valuable, may not be feasible or affordable for all families. Option B, teaching parents how to read nutrition labels, is important but secondary to understanding the overall concept of a balanced diet. Option D, discussing ways to incorporate more vegetables into meals, is beneficial but should come after establishing the foundation of a balanced diet.

Correct Answer: A

Rationale: The correct answer is the importance of taking prenatal vitamins. Prenatal vitamins are crucial for the health of both the mother and the baby as they provide essential nutrients required for fetal development. While handling common discomforts of pregnancy (choice B) is important for maternal well-being, it does not directly impact the health of the baby. Preparing for labor and delivery (choice C) focuses more on the delivery process rather than the overall health of the mother and baby during pregnancy. Breastfeeding techniques (choice D) are relevant postpartum, not during the prenatal period, and do not directly impact the health of the baby during pregnancy.

Correct Answer: C

Rationale: A temperature of 99°F (37.2°C) in a postoperative client requires immediate intervention as it may indicate the presence of infection. Elevated temperature post-surgery can be a sign of surgical site infection or systemic infection, which can lead to serious complications if not addressed promptly. Monitoring and managing a fever in a postoperative client is crucial to prevent further complications. The other findings, such as a heart rate of 90 beats per minute, oxygen saturation of 92%, and pain at the surgical site, are common postoperative assessments that may not necessarily require immediate intervention unless they are significantly out of normal range or causing severe distress to the client.