Answer:
Bc the stars from the 1959s are more like hippies? Their music was more slower more fun. More like life of the party. And now our artists wear all sorts of clothes, we do collabs, we have music videos.
I believe that (A) allowed for function, historical significance, and aesthetics to all be important.
Function: The statues also function as the pillars of the building to hold the building up
Historical significance: The statues look to me to be carved with the impression of a certain ruler, and have historical significance of what the ruler have done carved on the bottom part of his 'clothing'.
Aesthetics: As this is a masterpiece, and uses art to express the history, Aesthetics is also used.
hope this helps