Correct Answer: A

Rationale: The correct answer is A: Prostate-specific antigen (PSA). PSA is a marker specifically used for prostate cancer screening. Elevated levels of PSA can indicate prostate cancer or other prostate-related issues, prompting the need for further diagnostic investigations. Choices B, C, and D are not typically associated with prostate cancer screening. Human chorionic gonadotropin (hCG) is related to pregnancy, alpha-fetoprotein (AFP) is associated with liver and germ cell tumors, and carcinoembryonic antigen (CEA) is linked to colorectal cancer.

Correct Answer: B

Rationale: The correct answer is B - 'Identify the underlying causative condition.' When a client is experiencing delirium, it is crucial to determine the root cause of this acute change in mental status. This can involve a thorough assessment to identify any medical conditions, medications, infections, or environmental factors that may be contributing to the delirium. By pinpointing the underlying cause, appropriate interventions can be implemented to address the specific issue. Choices A, C, and D are incorrect because controlling behavioral symptoms with low-dose psychotropics, increasing environmental stimulation, and administering antipsychotic medication do not target the primary need of identifying and addressing the causative condition of delirium.

Correct Answer: A

Rationale: Morals are the values and beliefs that guide behavior and decision-making. While beliefs are part of the equation, morals specifically dictate how individuals act and make choices. Ethics, on the other hand, refer to a system of moral principles governing conduct. Autonomy, although important, is not directly related to the values and beliefs that guide behavior and decision making.

Correct Answer: B

Rationale: The correct answer is to ensure oxygen tanks are kept upright and away from heat sources. This is crucial to prevent any potential fire hazard, as oxygen supports combustion. Restricting fluid intake while using oxygen (choice A) is not necessary for oxygen safety. Allowing family members to smoke in designated areas (choice C) poses a significant fire risk. Storing oxygen tanks in a closet when not in use (choice D) is unsafe because proper ventilation is needed to prevent oxygen accumulation.

Correct Answer: B

Rationale: The correct action for the nurse to take is to report the client's decision to the provider who obtained informed consent. This ensures that the provider is informed of the client's change in decision and can discuss the situation further with the client. Choice A is incorrect as ignoring the client's decision is not appropriate and goes against the principles of patient autonomy. Choice C is incorrect because involving the family in convincing the client can be coercive and may not respect the client's autonomy. Choice D is incorrect because the nurse should not re-sign the informed consent form without the client's consent and a discussion with the provider.