Which of the Following Is Most Likely to Be Served

Multiple Choice

Which of the following is most likely to be served in a last-in, first-served (LIFS) queue discipline?

A) customers checking out at a grocery store
B) the in-basket on a manager's desk
C) patients entering a hospital emergency room
D) patrons waiting to be seated in a casual-dining restaurant
E) use of flowers inventory in a floral shop