Correct Answer: B

Rationale: A nurse with Marfan syndrome who is postmenopausal can safely care for the client because Marfan syndrome does not affect the ability to care for this client, and postmenopausal status minimizes the risk of radiation exposure affecting reproductive health. Choice A is incorrect because pregnancy increases the risk of radiation exposure to the fetus. Choice C is incorrect because a nurse with a cold may have a compromised immune system and should not be exposed to radiation therapy. Choice D is incorrect because lactation can increase the risk of radiation exposure to breast tissue.

Correct Answer: D

Rationale: The correct answer is D: 4-6 years of age. According to current CDC guidelines, a child receiving the measles, mumps, rubella (MMR) vaccine at 12 months of age should plan to receive the MMR booster between 4-6 years of age. Choices A, B, and C are incorrect as they do not align with the CDC's recommended age range for the MMR vaccine booster. It is crucial for healthcare providers to stay updated with current guidelines to ensure the timely administration of vaccines for optimal protection.

Correct Answer: C

Rationale: Verifying the blood type and Rh factor with another healthcare professional is the most crucial action to prevent a transfusion reaction. Ensuring compatibility between the donor blood and the recipient is essential in preventing adverse reactions such as hemolytic transfusion reactions. Checking vital signs is important for monitoring the client during the transfusion process but does not directly prevent a transfusion reaction. Using a blood filter can help remove clots and debris but does not address the risk of a reaction due to blood type incompatibility. Administering antihistamines before the transfusion is not a standard practice to prevent transfusion reactions related to blood type incompatibility.

Correct Answer: A

Rationale: Option A is the correct answer because understanding the percentage of the population under 19 years of age in each of the previous five years helps to determine if the high percentage of youth is a consistent trend or a recent change. This information is crucial for assessing the need for a new well-child clinic. Choices B, C, and D are incorrect because they do not directly address the gaps in the data related to the age distribution trend over time, which is essential for making an informed decision about the necessity of the proposed clinic.

Correct Answer: A

Rationale: The correct answer is A. Addressing transportation issues is crucial when working with low-income populations as lack of transportation can be a significant barrier to accessing healthcare services. This information is important for new employees to understand the challenges faced by the clinic's clients and to strategize ways to overcome this barrier. Choices B, C, and D are incorrect because while they may be relevant considerations, addressing transportation barriers should be a priority given its impact on accessing care for this specific population.