All the dishes are on buffet table .French call that kind of "lunch" or "diner" a buffet : it means you just help yourself and take whatever you want as often as you want ....
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.
