A passage states: 'The old lighthouse stood at the edge of town, its beam sweeping the dark water each night, though no ships had passed in decades.' What does this detail most likely suggest about the lighthouse?
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A
It is a symbol of persistent duty despite irrelevance
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B
It is a warning that the town is in danger
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C
It indicates the town was once a major fishing hub
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D
It shows that the narrator fears the ocean