D. The lamps represent Granny Weatherall's memories.
Explanation:
In this excerpt, the lamps represent Granny Weatherall's memories. Granny Weatherall is about to die, and she is thinking about her past and her life, and whether everything she did was worth it. However, as her mind is failing, Granny's mind becomes a valley covered in fog. Everything is unclear and blurry. The only hope Granny has is in the memories she has been able to preserve. These memories are the lamps that are lit during the night.
