How does the author generally present the information in the extract?

Correct Answer: C

Rationale: The author generally presents the information in a cause-effect format. The scientist talks about the increase in carbon dioxide emissions by countries like China, India, and Brazil leading to rising global temperatures. The politician, on the other hand, argues against a causal link between carbon emissions and temperature increase, suggesting a natural rise in temperatures. The information is structured around the cause of carbon emissions and its effect on global temperatures. Choice A, chronological order, is incorrect as the information is not presented in a time sequence but rather based on cause and effect. Choice B, comparison-contrast, is not the best description as the focus is more on cause and effect rather than comparing or contrasting different elements. Choice D, conclusion-premises, is also incorrect as the information does not follow the pattern of drawing conclusions based on premises but rather discusses the relationship between carbon emissions and temperature increase.

Correct Answer: D

Rationale: The correct answer is D. It can be inferred from the passage that historians have difficulty definitively pinpointing Viking historical events. The passage highlights the uncertainty around Leif Erikson's birth year, conflicting accounts of interactions with natives, and the lack of clarity regarding specific events in Viking history. Choices A, B, and C are incorrect. There is no indication in the passage that the Vikings disliked exploring the New World; Leif Erikson's banishment did not directly lead to his exploration of Canada but rather his desire to spread Christianity and find new lands; and there is no mention of Leif Erikson not sharing his stories with the King of Norway.

Correct Answer: D

Rationale: Shiloh occurred earlier than the other battles listed. Shiloh took place in April 1862 during the American Civil War, making it the earliest battle among the options provided. Cold Harbor occurred in June 1864, Chancellorsville in May 1863, and Atlanta in July-September 1864. Therefore, Shiloh is the correct answer. Choice A (Cold Harbor) is incorrect because it happened after Shiloh. Choice B (Chancellorsville) is incorrect because it occurred after Shiloh. Choice C (Atlanta) is also incorrect as it took place after Shiloh.

Correct Answer: D

Rationale: According to the food chain diagram, mongooses are consumers that feed on smaller animals like mice, making choice D the correct answer. Shrub (choice A) is a plant and not a typical food for mongooses. Aardvark (choice B) is a large mammal that is not a primary food source for mongooses. Vulture (choice C) is a scavenger bird that typically feeds on carrion, not a preferred food for mongooses.

Correct Answer: D

Rationale: The event that occurred fourth on the timeline was starting a school for the deaf. Looking at the provided extract, we can see that the order is significant when discussing a timeline. Out of the given events, founding a school for the deaf would come fourth in chronological order. 'Helped found National Geographic Society,' 'Developed a metal detector,' and 'Moved to Canada' would precede starting a school for the deaf in a chronological timeline, making them incorrect choices.