Meal Go-Getter Etiquette 101

Let's say that you are in charge of going to get lunch for your family or friends. One of the people you are getting food for requests pretzels and apple slices with their sandwich. Let's say said establishment is out of these items. Do you simply forget getting them anything in addition and only bring back their sandwich? No, you get them a different item- perhaps another bag of chips that the establishment is carrying at the time. Who cares if you do not know what flavor they like. Obviously this person was VERY hungry to order two sides with their sandwich, so to come back with NONE and only a sandwich may result in them wanting to A) Cry B) Punch someone or C) Force this person to go to the grocery store so that they can get pretzels and an apple and then they find themselves buying a whole peanut butter and chocolate pie that they plan on eating with their emotions later on in the day or D) All of the above.