The entire quatrain where that phrase is found talks about time itself. It says that time gives beauty, thus making that particular person handsome, but time also takes away that same beauty - unfair which fairly doth excel. What was once young and beautiful will become old and wither as time goes by.
If the authors last name was in the text then you should still cite them. You should always cite them even if they were already mentioned.
The answer is ABCB
Hope this helps
Because the hero over time will change.
