Correct Answer: B

Rationale: The correct answer is B: applying a prosthetic device. Home health aides are trained and authorized to assist with the application and management of prosthetic devices for clients. Evaluating a pressure sore (choice A) requires clinical assessment and judgment typically performed by a licensed healthcare provider such as a nurse. Performing a sterile dressing change (choice C) involves aseptic technique and wound care skills that are usually performed by licensed healthcare professionals. Assessing the client's need for an elevated toilet seat (choice D) involves a level of assessment and decision-making that is beyond the scope of practice for a home health aide.

Correct Answer: C

Rationale: In a client with COPD receiving oxygen therapy, an effective response is indicated by a respiratory rate of 20 breaths per minute. This suggests that the client is effectively oxygenating while maintaining an appropriate respiratory rate. Choices A, B, and D are incorrect because expectorating secretions easily, having an oxygen saturation of 92%, and arterial blood gases showing a pH of 7.35 are not specific indicators of the effectiveness of oxygen therapy in COPD. Oxygen saturation of 92% may still be suboptimal in COPD, and arterial blood gases showing a pH of 7.35 may not necessarily reflect the overall effectiveness of oxygen therapy.

Correct Answer: A

Rationale: A serum calcium level of 11 mg/dL indicates hypercalcemia, which can be a complication of hyperparathyroidism and requires immediate intervention. Hypercalcemia can lead to serious complications such as cardiac dysrhythmias, renal failure, and neurologic symptoms. Monitoring and managing serum calcium levels are crucial in clients with hyperparathyroidism. Serum phosphorus, magnesium, and albumin levels are important to assess in clients with hyperparathyroidism, but they do not require immediate intervention as hypercalcemia poses a more urgent risk.

Correct Answer: D

Rationale: The correct answer is D: explain that the client should stay home for the next few days. Viral conjunctivitis is highly contagious, and the client should avoid close contact with others until it resolves. Returning to work while still contagious can lead to the spread of the infection to coworkers and customers. Choice A is incorrect because wearing a face mask may not provide sufficient protection against spreading the virus in a close work environment. Choice B is irrelevant to the situation as the focus should be on the client's health and preventing the spread of the infection. Choice C is also unrelated to the management of viral conjunctivitis and does not address the contagious nature of the condition.

Correct Answer: A

Rationale: Setting up vaccination clinics in accessible locations is the most effective intervention to improve vaccination rates. This intervention ensures easy access to vaccination services for community members, removing barriers such as transportation or time constraints. Distributing flyers (Choice B) may increase awareness but may not directly address access issues. Offering incentives (Choice C) might temporarily boost vaccination rates but may not lead to sustained behavior change. Partnering with local businesses (Choice D) could be beneficial for promotion but may not directly impact vaccination accessibility.