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.

Correct Answer: D

Rationale: The correct answer is D because participating in contact sports can increase the risk of injury and bleeding in a client receiving warfarin therapy. Warfarin is a blood thinner, and activities with a higher risk of injury should be avoided to prevent bleeding complications. Choices A, B, and C are all correct statements for a client on warfarin therapy. Avoiding foods high in vitamin K helps maintain consistent anticoagulation levels, using a soft toothbrush and an electric razor reduces the risk of bleeding gums and cuts, and keeping appointments for blood tests ensures proper monitoring of the client's international normalized ratio (INR) levels.

Correct Answer: D

Rationale: The correct answer is D. Increasing potassium intake can lead to hyperkalemia, especially in clients taking ACE inhibitors like enalapril. Hyperkalemia is a potential side effect of ACE inhibitors and can be exacerbated by consuming potassium-rich foods. Monitoring blood pressure regularly (A) is important when taking antihypertensive medications. Reporting signs of infection (B) is crucial as ACE inhibitors can lower the immune response. Avoiding salt substitutes (C) is necessary because they may contain potassium chloride, leading to increased potassium levels, which can be harmful in combination with ACE inhibitors.

Correct Answer: B

Rationale: The correct answer is B: botulism toxin. The symptoms described, including symmetric, descending flaccid paralysis, blurred vision, double vision, and dry mouth, are classic manifestations of botulism, which is caused by a toxin produced by Clostridium botulinum. This toxin affects the nervous system, leading to muscle weakness and paralysis. Choice A, ricin, typically presents with gastrointestinal symptoms and organ failure. Choice C, sulfur mustard, causes blistering skin and respiratory issues. Choice D, yersinia pestis, is associated with the plague and presents with fever, chills, weakness, and swollen lymph nodes.

Correct Answer: A

Rationale: Validating that the children sent home did develop chickenpox is the most crucial initial step for the nurse. This intervention ensures that the appropriate public health measures are implemented for the containment of chickenpox. Reporting a viral endemic or confirming the number of children with symptoms may be important but are secondary to confirming the diagnosis. Determining the number of people exposed comes after confirming the diagnosis to assess the extent of the outbreak and implement necessary control measures.