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
I would say similar shapes
Common change is around all environments, from pretators, prey, food supply, and many more simple things. But change realy never happens unless its is forced. Natural selection