Answer and explanation

Correct answer: A. to study or work late into the night

  1. Step 1: The phrase alludes to burning kerosene or oil lamps to work after dark before electric lighting. Step 2. It signifies diligent application to intellectual work or research late during nighttime hours. Answer: to study or work late into the night. Why not the others: It does not refer to literal resource destruction, setting fires, or delaying work.

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