Instructions: select the correct answer. select the correct dining etiquette that should be followed at an elegant restaurant. no poner los codos sobre la mesa. no dejar propina para al camarero. no hacer reserva. no saludar al camarero.

The correct dining etiquette that should be followed at an elegant restaurant is:

- No poner los codos sobre la mesa.

Explanation:

"No poner los codos sobre la mesa" that translates do not put the elbows on the table is a norm of etiquette used in elegant places, the other options translates: "no dejar propina para al camarero":  do not leave a tip for the waiter, "no hacer reserva" : do not make a reservation and "no saludar al camarero": do not greet the waiter, are complete opposites to the etiquette, reason why are discard.