Which beverage is specifically designed for breakfast at Jack in the Box?

The choice of large decaf coffee is specifically designed for breakfast at Jack in the Box because coffee is traditionally associated with the morning meal and is often a go-to beverage for customers looking for something warm to kickstart their day. In many breakfast settings, particularly in fast-food restaurants, coffee is a staple offering that complements various breakfast food items.

While the other options include food items or different drinks, they do not specifically align with the common breakfast beverage options that patrons expect. Options like scrambled eggs and the breakfast combo meal are food items, while apple juice serves more as a children's choice or a refreshing drink that doesn't carry the same traditional breakfast appeal as coffee does. Thus, large decaf coffee stands out as the beverage specifically tailored for breakfast needs, aligning with customer expectations for the meal time.