The following text discusses transportation innovation.
High-speed rail offers significant advantages over air travel for medium-distance trips. Trains eliminate airport security delays and can deposit passengers directly in city centers. They also produce fewer carbon emissions per passenger mile. However, the enormous infrastructure costs have limited high-speed rail development in many countries.
Which choice best describes the overall structure of the text?
It presents benefits of high-speed rail while acknowledging a limitation.
It argues that all air travel should be replaced by trains.
It traces the historical development of railway systems.
It compares high-speed rail costs across different countries.
Correct Answer: A
Choice A is the best answer. The text presents benefits (no delays, city centers, low emissions) but acknowledges infrastructure costs as a limitation.
- Evidence: The text lists advantages: "eliminate airport security delays," "deposit passengers directly," "fewer carbon emissions." It ends with "However... enormous infrastructure costs have limited..." (limitation).
- Reasoning: The structure balances positive aspects with a significant negative factor.
- Conclusion: This matches "presents benefits... while acknowledging a limitation."
💡 Strategy: Look for the pivot word "However" which introduces the limitation after the benefits.
Choice B is incorrect because no absolute replacement is argued. Choice C is incorrect because no historical development is traced. Choice D is incorrect because country-by-country comparisons aren't made.