Correct Answer: A

Rationale: The correct answer is A: 'A statement that participants can leave the study at will.' This information is crucial to include in the informed document to ensure that participants are aware of their right to withdraw from the study at any time without any negative consequences. Choice B is incorrect because participants should not be assigned to experimental or control groups without their knowledge and consent. Choice C is incorrect because disclosing a list of clients participating in the study violates confidentiality. Choice D is incorrect as the description of the data evaluation framework is important but not as critical as ensuring participants know they can leave the study at will.

Correct Answer: B

Rationale: The correct action the nurse should take when caring for a client receiving brachytherapy is to limit the client's visitors to 30 minutes per day. This is crucial to reduce exposure to radiation and maintain safety during the brachytherapy procedure. Cleansing equipment before removal from the client's room may be important for infection control but is not directly related to brachytherapy procedures. Discarding the client's linens in a double bag and discarding the radioactive source in a biohazard bag are incorrect choices as they do not specifically address the safety measures needed during brachytherapy for prostate cancer.

Correct Answer: C

Rationale: The correct instruction the nurse should include is to advise the client to eat small, frequent meals to reduce symptoms of Crohn's disease. This eating pattern can help manage symptoms by reducing the workload on the digestive system. Choice A is incorrect because foods high in fiber can aggravate symptoms in Crohn's disease. Choice B is incorrect because not all individuals with Crohn's disease need to avoid dairy products, and it is not a universal recommendation. Choice D is incorrect because increasing whole grains may not be suitable for everyone with Crohn's disease, as it can worsen symptoms in some cases.

Correct Answer: B

Rationale: The correct answer is to ensure the drainage bag is positioned above the bladder. This positioning prevents urine reflux into the bladder, reducing the risk of catheter-associated infections. Changing the catheter too frequently (Choice A) can actually increase the risk of infection by introducing pathogens. Performing routine catheter irrigation (Choice C) is no longer recommended as it can increase the risk of infection by introducing bacteria. Emptying the drainage bag every 4 hours (Choice D) is a standard practice to prevent urinary stasis but is not directly related to preventing catheter-associated infections.

Correct Answer: B

Rationale: Clients receiving chemotherapy are instructed to avoid fresh fruits and vegetables to lower the risk of infection. Fresh produce may harbor bacteria or other pathogens that could be harmful to individuals with compromised immune systems. Taking the temperature daily may be important but is not directly related to preventing infection. Limiting high-protein foods is not necessary unless there are specific dietary restrictions due to the treatment plan. Increasing the intake of high-fat foods is not recommended during chemotherapy as a high-fat diet may lead to other health issues.