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The writer is most likely to consider which of the following as the real reason for the cyclical regularity of bridge collapses?

1. The radical change that engineering principles undergo at periodic intervals.
2. The bridge-building technologies being useful for a limited period of approximately 30 years.
3. The communication gap between two generations of engineers.
4. Engineers do not realise that things may not work at larger scales.

Correct answer: Engineers do not realise that things may not work at larger scales.

Solution

The writer suggests that bridge failures recur because engineers often assume what works at a smaller scale will also work at a larger scale. This scale-related oversight explains the cyclical nature of collapses better than the other choices. The option about larger scales captures the writer's main concern.

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