Napkin Etiquette is really important for us to master. Please choose all those suitable tips for using your napkin.

At informal meals, place the napkin in your lap immediately upon seating.
B. During formal occasions, before unfolding the napkin, wait for the hostess to remove her napkin from the table and unfold it in her lap.
C. Place the napkin in your lap upon seating.
D. When leaving the table temporarily, put the napkin on your chair.
E. At the meal's end, fold your napkin and place it to the left of your place setting.