Answer:
a
Step-by-step explanation:
Boughs: refers to the limbs of the Autumn tree
Late: refers to lately or recently
That time of year thou mayst in me behold (A)
When yellow leaves, or none, or few, do hang (B)
Upon those boughs which shake against the cold, (A)
Bare ruin’d choirs, where late the sweet birds sang. (B)
In me thou seest the twilight of such day (C)
As after sunset fadeth in the west, (D)
Which by and by black night doth take away, (C)