The following text discusses the history of timekeeping.
Before mechanical clocks, people relied on natural phenomena to track time. Sundials measured the sun's position, while water clocks marked time through controlled water flow. These methods were imprecise by modern standards but sufficient for agricultural and religious schedules. The invention of mechanical clocks in the 14th century revolutionized timekeeping accuracy.
Which choice best describes the overall structure of the text?
It explains how sundials work in technical detail.
It contrasts early timekeeping methods with a later innovation.
It argues that modern clocks are too precise for daily needs.
It provides instructions for building a water clock.
Correct Answer: B
Choice B is the best answer. The text describes early methods (sundials, water clocks) and their limitations, then contrasts with the mechanical clock innovation.
- Evidence: The text describes "Before mechanical clocks" (sundials, water clocks) and notes they were "imprecise." It then introduces "mechanical clocks" which "revolutionized... accuracy."
- Reasoning: The structure compares the old, imprecise methods with the new, accurate invention.
- Conclusion: This matches "contrasts early methods with a later innovation."
💡 Strategy: Look for the chronological shift: Before -> Invention -> Revolution.
Choice A is incorrect because sundial mechanics aren't detailed. Choice C is incorrect because no argument about excessive precision is made. Choice D is incorrect because no building instructions are given.