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
There are three types of balance which are symmetrical balance, asymmetrical balance, and approximate balance. Symmetrical balance is where the artwork is evenly placed with its balance. Asymmetrical balance is where it’s not evenly placed with balance. Approximate balance is where the piece of artwork has balance using the other elements of art like colors, lines, shapes and more, but doesn’t have any identical areas or objects within the artwork