【单选题】According to Frost’s recollection, what does “the darkest evening of the year” mean to him in his poem “Stopping by Woods on a Snowy Evening”?
A.
It means figuratively to the poet the darkest evening both in time and economy.
B.
It means figuratively to the poet the darkest evening of the year in economy.
C.
It means figuratively to the poet the darkest evening of the year in time.
D.
It means figuratively to the poet a happy evening both in time and economy.