Correct Answer: B

Rationale: The paragraph provides a historical account of the Great Emu War in Australia, outlining the events, dates, and outcomes of the conflict between the Australian government and the emu population. It does not focus on personal opinion, military strategies, or the scientific impact of emus, making choice B the most accurate evaluation. Choices A, C, and D are incorrect as they do not align with the content of the paragraph.

Correct Answer: D

Rationale: One of Hedy Lamarr's notable inventions was the frequency-hopping system, which she developed during World War II to secure radio-controlled torpedoes. This system changed frequencies to prevent jamming by enemies. Lamarr's frequency-hopping technology laid the groundwork for modern technologies like cell phones, Bluetooth, and WiFi. Choices A and B are mentioned as some of Lamarr's failed inventions in the passage. Choice C refers to the military technology that inspired Lamarr's invention, not her invention itself.

Correct Answer: B

Rationale: The word 'shocked' has a negative connotation as it implies a strong feeling of surprise or dismay. In the context of the provided extract, the word 'shocked' would be fitting to describe the reaction of individuals witnessing the sudden outbreak of violence during the skirmish at Lexington and Concord. The other choices do not carry a negative connotation in this context: 'Contained' is neutral, 'Complimentary' is positive, and 'Reportedly' is neutral.

Correct Answer: B

Rationale: The correct answer is B because the evidence from the 2008 study mentioned in the passage supports the inference that napping for 60 minutes can improve verbal memory, motor skills, and perceptual learning better than caffeine. This indicates that providing nap rooms at work can lead to improved productivity by enhancing cognitive functions. Choice A talks about the fatigue reported by employees but does not directly link it to productivity improvement. Choice C mentions that many successful companies have adopted the practice of work naps but does not specifically tie it to productivity enhancement. Choice D states the intention to provide nap rooms for employees but does not provide direct evidence of productivity improvement.

Correct Answer: B

Rationale: The correct answer is B: 'To inform about Clara Barton's life and achievements.' The passage provides a chronological account of Clara Barton's significant life events, from her birth to her philanthropic work during the Civil War and beyond. It aims to educate the reader about Barton's contributions and accomplishments rather than to express emotions, persuade readers to support a specific organization, or entertain with fictional tales. Therefore, choices A, C, and D are incorrect as they do not align with the informational content of the passage.