It is mentioned in the passage that before the electric lamp

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It is mentioned in the passage that before the electric lamp was invented, ...........

oil lamps and then candles were used

candles and oil lamps appeared about the same time

candles and then oil lamps were used

people did not use any form of lighting in their houses

Giải thích

Đáp án C

Dẫn chứng ở đoạn cuối: “For centuries homes were lit by candles until oil was found. Even then, oil lamps were no more effective than a cluster of candles.”