Answer:
They will evolve, of course:
Explanation:
Skyscrapers, just like most other things, will become much more advanced, stronger (to protect against natural disasters and such), and probably taller. Elevators will advance to allow more efficient treks, and offices will be more technologically advanced to streamline the work day.
The correct answer is A. Guests help themselves from a buffet table. This is however a changed version of the original French service which changed over the years. All of the food is presented at the same time and the people choose whatever they wish to eat.
It's nice but you could fix up the background and maybe the shading.