Correct Answer: D

Rationale: The author does not conclude choice A, and the passage does not deal with choice B. Only one paragraph deals with the topic in choice C. The passage is mostly about the pros and cons of barefoot running, making D the best choice

Correct Answer: D

Rationale: The passage does not suggest that super foods are more expensive than processed foods.

Correct Answer: D

Rationale: The correct answer is D. The passage focuses on describing sickle-cell anemia as a painful and inherited disease. It details how the abnormal sickle-shaped cells cause symptoms like bone pain, fever, and fatigue. While bone pain is mentioned as a symptom, it is not the main idea of the passage. Choice A is incorrect. Choice B, which mentions oxygen transport, is not the main idea but a general concept. Choice C, stating genetically inherited diseases affect thousands, is too broad and does not focus on the specifics of sickle-cell anemia. Therefore, D is the most precise choice.

Correct Answer: C

Rationale: The summary accurately reflects the balanced view of the benefits and risks of sunlight.

Correct Answer: D

Rationale: The author's purpose is to inform readers about the benefits of sunlight.