I'll give you a question, please answer with step-by-step reasoning process. The poor girls needed a light to see, what was the relationship between that light and finishing her homework?\nOptions:\n- darkness\n- cumbersome\n- obesity\n- forceful\n- crucial

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Crucial is decisive or critical, especially in the success or failure of something. The poor girls needed a light to see, the relationship between that light and finishing her homework was crucial.
The answer: crucial.
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