Correct Answer: B

Rationale: The correct answer is B: 'Leif Erikson deserves more credit for exploring America.' The author's main conclusion, as supported by the extract, is that Leif Erikson should receive more credit for his contributions in exploring the New World. Choice A is incorrect as it does not capture the essence of the author's conclusion, which is about recognizing Erikson's achievements rather than just labeling him as a legendary explorer. Choice C is incorrect because while Leif Erikson did convert to Christianity, the primary focus of the conclusion is on his exploration rather than his motivations. Choice D is incorrect as it only mentions one aspect of Erikson's achievements (contacting the natives) and does not encompass the broader idea of giving him more credit for his explorations.

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: A

Rationale: Only Twin Theatres does not offer a showing before 6 p.m. or after 10 p.m., which are the only times Thomas and his sister are available. The other cinemas - Reveler Cinema, Big Screen 14, and Best Seat in The House - have showings that fall within their available time slots, making them viable options for Thomas and his sister. Therefore, Twin Theatres is the correct answer. Reveler Cinema has showings at 5:45 p.m. and 7:15 p.m., Big Screen 14 has showings at 6:00 p.m., 6:45 p.m., 9:10 p.m., and 10:05 p.m., and Best Seat in The House has showings at 8:20 p.m., 9:55 p.m., and 11:25 p.m.

Correct Answer: B

Rationale: The main point of dispute between the conservative and liberal politicians is about whether certain classes of people rely on social welfare programs to meet their basic needs. The conservative politician believes that no citizens truly need government assistance and that it only makes things easier, while the liberal politician argues that various groups, such as immigrants, single mothers, and the elderly, require a safety net for basic necessities. Choice A is incorrect as it refers to the impact on national debt, which is not the primary point of dispute. Choice C is incorrect as it discusses the consequences of failing to provide social welfare programs, not the main point of disagreement. Choice D is irrelevant as it talks about the backgrounds of the country's leaders, which is not the focus of the dispute between the politicians.

Correct Answer: D

Rationale: The statement 'Smokers tend to stink and create pervasive nastiness' is an opinion since it reflects the author's subjective view on the hygiene and social impact of smoking. The other choices, A, B, and C, are all factual statements based on research or observations without expressing a personal viewpoint. Choice A presents a statistic from the CDC, choice B discusses a comparison related to the cost of cigarettes, and choice C describes a potential consequence of smoking without inserting personal judgment.