Correct Answer: C

Rationale: The correct answer is C: High-vitamin K foods. Foods high in vitamin K can interfere with the effectiveness of anticoagulants. Vitamin K plays a crucial role in blood clotting, so consuming high amounts of it can counteract the anticoagulant effects. Choices A, B, and D are incorrect as they do not directly interfere with the action of anticoagulants.

Correct Answer: B

Rationale: Weighing the client daily at the same time each day is the most accurate method for monitoring fluid balance. Changes in body weight can reflect fluid retention or loss. Measuring and recording fluid intake and output (Choice A) is important but may not provide immediate changes in fluid status. Assessing vital signs (Choice C) can offer some information but may not be as specific to fluid status as daily weighing. Checking the client's lungs for crackles (Choice D) is more related to assessing respiratory status rather than direct fluid monitoring.

Correct Answer: B

Rationale: When collecting a stool specimen, the nurse should usually take about 1 inch of the specimen or a teaspoonful for testing purposes. This amount is sufficient for laboratory analysis and helps ensure accurate results. It is important for the nurse to follow the proper procedure for specimen collection to maintain accuracy in diagnostic testing. Choices A, C, and D are incorrect because they do not provide the correct information on the amount of specimen needed for stool specimen collection.

Correct Answer: D

Rationale: The correct interventions for a client presenting with acute epigastric pain and vomiting bright red blood are to assess the client's vital signs and start an IV with an 18-gauge needle. Assessing vital signs helps in determining the client's current condition and response to treatment, while starting an IV is crucial for administering medications and fluids. Beginning iced saline lavage is not appropriate in this situation as the priority is to stabilize the client and address potential bleeding. Therefore, options A and B are correct choices, making option D the most appropriate answer.

Correct Answer: A

Rationale: Patients with chronic renal failure should avoid potassium due to impaired kidney function. The kidneys play a crucial role in regulating potassium levels in the body. In renal failure, the kidneys may not be able to excrete excess potassium effectively, leading to hyperkalemia. Calcium, iron, and zinc are not typically restricted in chronic renal failure unless there are specific individual circumstances, making them incorrect choices.