Correct Answer: C

Rationale: The correct answer is C because taking two medications together helps prevent the development of drug resistance in HIV treatment. Choice A is incorrect because the primary goal of combination therapy is not necessarily a faster recovery. Choice B is incorrect as the main purpose of combining medications in HIV treatment is to prevent resistance rather than improving the immune system. Choice D is incorrect because while it is true that the medications may target different parts of the virus, the main reason for using both together is to prevent resistance.

Correct Answer: C

Rationale: The correct answer is C: 'I might not realize the full effect of the medication for several weeks.' Levothyroxine is a medication that may take several weeks for the full effect to be evident. Choice A is incorrect because levothyroxine should be taken on an empty stomach. Choice B is incorrect because immediate results are not expected with levothyroxine. Choice D is incorrect because stopping the medication without consulting a healthcare provider can be harmful, even if the client feels better.

Correct Answer: D

Rationale: The correct answer is D because metformin should be held before a contrast CT scan to prevent the risk of kidney damage. Choices A, B, and C are all correct statements regarding the preparation and experience of a CT scan with contrast. It is important to fast before the procedure, keep the head still during the scan, and expect a warm sensation when the dye is injected.

Correct Answer: B

Rationale: Limiting exposure to extreme temperatures is important to protect workers from heat-related illnesses.

Correct Answer: A

Rationale: When a patient is exhibiting signs of acute myocardial infarction (AMI), the priority action is to call for emergency assistance immediately. This ensures that the patient receives prompt and appropriate care, including interventions such as administering oxygen, nitroglycerin, and monitoring cardiac rhythm. Administering nitroglycerin should only be done if prescribed by a healthcare provider after assessment and confirmation of AMI. Monitoring the patient's cardiac rhythm is important but not the initial action needed in this critical situation. Administering oxygen and preparing for an ECG are important interventions but should follow the immediate step of calling for emergency assistance.