Since precise language deals with several different aspects of specific wording choices.
➡ The answer would be A
Well since you are trying to persuade the listener, I would say B. Opinion, Illusion.
Portraits are being compared to a beautiful, elegant sunset.
The speaker is saying that a portrait is much more fine and beautiful than other faces one sees throughout the day, and a typical evening's sunset is, similarly, not as beautiful as a shiny, smooth-looking sunshine.
