Correct Answer: B

Rationale: The commercial for cold medicine narrated by a man in a doctor's coat is the correct answer. This commercial claims professional authority without providing any evidence of the narrator's credentials. While the man may appear to be a doctor with his coat, there is no proof that he is actually a medical professional or that the product is recommended by experts. This lack of evidence can mislead consumers by giving the product an air of legitimacy and credibility without factual support. Choices A, C, and D do not fit the criteria as they involve a professional athlete endorsing a product, children enjoying a toy, and real consumers providing testimonials respectively.

Correct Answer: C

Rationale: Based on the provided water schedule for addresses in the town of Audley, odd-numbered addresses ending in 7 and 3, like 5487 South Elm Street, are allowed to water their lawns on Thursdays. Therefore, the Morgan family will be able to water their lawn on Thursday. Choice A (Tuesday), Choice B (Wednesday), and Choice D (Saturday) are incorrect as they do not align with the watering schedule for odd-numbered addresses as per the town's guidelines.

Correct Answer: B

Rationale: The main idea of the passage is that the FDA has a specialized program for regulating dietary supplements. The passage explains how the FDA regulates dietary supplements differently from drugs, focusing on the requirements for marketing, good manufacturing practices, monitoring safety, and taking action against unsafe products. Choice A is incorrect because while it mentions good manufacturing practices, it's not the central idea of the passage. Choice C is incorrect as there is no emphasis on prosecuting individuals in the passage. Choice D is incorrect because stating that the FDA is part of the federal government is not the main idea discussed in the passage.

Correct Answer: C

Rationale: Statement C directly provides evidence of coastal land erosion by stating that Louisiana has lost a significant amount of coastal land area. This supports the passage's claim that many coastal islands are eroding. Choice A is incorrect because the expense of recent hurricane seasons does not directly relate to coastal land erosion. Choice B is incorrect as the active period of the Atlantic Basin does not specifically address coastal land erosion. Choice D, while related to coastal storms, does not directly support the claim that many coastal islands are eroding.

Correct Answer: D

Rationale: The kind of sources different audiences value can indeed influence the credibility of a source for them. Different audiences may place varying levels of trust in different types of sources, such as peer-reviewed journals, government reports, or mainstream media outlets. Understanding the preferences of the target audience is essential for establishing credibility when presenting information. Choices A, B, and C are incorrect. The author's reputation is important but not more critical than citing sources, as proper citations contribute to transparency and reliability. The recency of a source is essential but not always the most crucial factor; relevance to the subject matter is also significant. The author's point of view and purpose are indeed relevant to assessing credibility; understanding their biases and intentions is vital in evaluating the reliability of a source.