Correct Answer: B

Rationale: The correct answer is B: High blood cholesterol, high blood pressure, and cigarette smoking are three major causes of atherosclerosis. Atherosclerosis is mainly attributed to the buildup of cholesterol-rich plaques in the arteries, high blood pressure causing damage to the arterial walls, and the harmful effects of cigarette smoking on blood vessels. Choices A, C, and D are incorrect because they do not directly relate to the primary causes of atherosclerosis.

Correct Answer: D

Rationale: Assisting the client to sit in a chair is an essential nursing intervention postoperatively as it helps promote circulation, prevent complications like blood clots, and aids in the recovery process. Changing the infusion rate of intravenous fluid (Choice A) requires a physician's order and is not an independent nursing intervention. Encouraging the client to discuss feelings (Choice B) is important for emotional support but not as crucial as physical care immediately postoperatively. Administering opioid narcotic medications (Choice C) for pain management should be based on a prescribed schedule and assessment rather than being an independent nursing action.

Correct Answer: D

Rationale: The correct answer is D, Forward Surgical Team (FST). The FST is staffed with two surgeons, two nurse anesthetists, a medical/surgical nurse, two operating room specialists, and two practical nurses. This specialized team is designed to provide immediate surgical care close to the frontline. Choices A, B, and C are incorrect as they do not match the specific composition of personnel described in the question.

Correct Answer: B

Rationale: The combat health support system in the field is primarily designed to project, sustain, and protect the health of soldiers during war and other operations. Choice A is incorrect as it focuses solely on evacuation and delaying return to duty, missing the broader scope of health support. Choice C is incorrect as it only mentions rearward evacuation and reassignment, which is not the sole purpose of the combat health support system. Choice D is also incorrect as it emphasizes far rear area care and delayed return to duty, neglecting the comprehensive nature of health support in combat situations.

Correct Answer: B

Rationale: Atherosclerosis is primarily caused by high blood cholesterol, high blood pressure, and cigarette smoking. These factors contribute to the buildup of plaque in the arteries. Choices A, C, and D are incorrect. Hyperthyroidism, underweight, and poor appetite do not directly cause atherosclerosis. Similarly, constipation, peptic ulcer disease, pancreatitis, kidney failure, edema, and sodium retention are not among the primary causes of atherosclerosis.