Correct Answer: B

Rationale: The correct answer is B because the passage highlights that insufficient sleep could lead to an increased risk of obesity. The passage emphasizes the importance of uninterrupted sleep in muscle development and mentions that inadequate sleep is linked to lowered levels of leptin, a hormone that controls appetite. This imbalance in leptin due to lack of sleep can lead to increased cravings for carbohydrates, contributing to obesity. Choice A is incorrect as the passage stresses the significance of both uninterrupted sleep and getting enough sleep for muscle growth. Choice C is incorrect because the passage clearly states that human growth hormone (HGH) is essential for muscle development. Choice D is incorrect as leptin is not essential for building muscle but is mentioned in the passage as a hormone related to controlling appetite and its link to inadequate sleep and obesity.

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 mention the divisions that make up the current CDC.

Correct Answer: A

Rationale: Unprocessed in this context means natural and untreated, as it refers to whole foods.

Correct Answer: B

Rationale: Compelling in this context means convincing, as it relates to the argument presented.