I think you need to be clear, do not use fancy words or descriptive words.
Answer:
formal and highly serious.
The chest, on that day of moving, had been set in the new attic, which was smaller than the other, and less frightening, perhaps because gaps in the cedar-shingled roof let dabs of daylight in. When the roof was being repaired, the whole space was thrown open to the weather. This is the answer.
Answer:
option c is correct for this answer